6th Grade Science Unit: Get Your Organisms Organized Unit Snapshot Topic: Cellular to Multicellular Duration: Grade Level: 6 10 Days Summary The following activities will cap off the previous life science units by comparing whole multicellular organisms and determining how they are classified based on shared characteristics. CLEAR LEARNING TARGETS “I can”…statements ____ identify the corresponding structures in the bodies of different classes of living things. _____make observations of physical characteristics from pictures of species and classify them into groups based on shared traits. ____infer the habitats of species based on how their adaptations can help them survive in specific environments. ____name the types of symmetry found in the bodies of different organisms and tell how the symmetry affects the function of the animal. Activity Highlights and Suggested Timeframe Days 1-2 Engagement: In Man v. Bird, students will compare the skeletal systems of vertebrates, in order to find the corresponding bones in the animals’ bodies. Day 3 Exploration: Students will explore ways to group multicellular organisms based on physical characteristics. Days 4-5 Explanation: Through reading and/or online presentations students will learn the different types of symmetry found in animals and plants. Students will use texts to learn why and how scientists classify organisms. Day 6-7 Elaboration: In Classy Buckeye Animals, students will research how scientists classify some Ohio animals and create mini-posters. Students will apply what they have learned about classification, by creating a cladogram, or evolutionary classification diagram, for a variety of animals and be able to justify their system of classification. Day 8 Day 9-10 Evaluation: Working with a given cladogram, students will show their understanding of how scientists classify animals and explain how the cladogram shows similarities among different species. Extension/Intervention: Using the characteristics of the various phyla and classes previously studied, students will make a train of animal groups using shared characteristics as the connectors for the train cars. LESSON PLAN NEW LEARNING STANDARDS: *The content statements for sixth-grade life science are each partial components of a larger concept. The parts have been isolated in the New Learning Standards to call attention to the depth of knowledge required to build to one of biology’s important foundational theories: Modern Cell Theory. It is recommended that the content statements be combined and taught as a whole. As a result, the sixthgrade life science New Learning Standards are being presented in the CCS curriculum arranged by their relevance to the levels of organization of living things. 6.LS.4 Living systems at all levels of organization demonstrate the complementary nature of structure and function. Whether the organism is single-celled or multicellular, all its parts function as a whole to perform the tasks necessary for the survival of the organism. Organisms have diverse body plans, symmetry, and internal structures that contribute to their being able to survive in their environments. SCIENTIFIC INQUIRY and APPLICATION PRACTICES: During the years of grades K-12, all students must use the following scientific inquiry and application practices with appropriate laboratory safety techniques to construct their knowledge and understanding in all science content areas: Asking questions (for science) and defining problems (for engineering) that guide scientific investigations Developing descriptions, models, explanations and predictions. Planning and carrying out investigations Constructing explanations (for science) and designing solutions (for engineering)that conclude scientific investigations Engaging in argument from evidence Obtaining, evaluating, and communicating scientific procedures and explanations *These practices are a combination of ODE Science Inquiry and Application and Frame-work for K-12 Science Education Scientific and Engineering Practices COMMON CORE STATE STANDARDS for LITERACY in SCIENCE: CCSS.ELA-Literacy.RST.6-8.4 Determine the meaning of symbols, key terms, and other domain-specific words and phrases as they are used in a specific scientific or technical context relevant to grades 6–8 texts and topics. CCSS.ELA-Literacy.RST.6-8.9 Compare and contrast the information gained from experiments, simulations, video, or multimedia sources with that gained from reading a text on the same topic. *For more information: http://www.corestandards.org/assets/CCSSI_ELA%20Standards.pdf STUDENT KNOWLEDGE: Prior Concepts Related to Energy Transfer Prior Concepts Related to Organisms and Reproduction PreK-2: Living things have specific traits. Living things require energy, water and a particular temperature range. Grades 3-5: Organisms are made of parts. Future Application of Concepts Grade 8: Cellular reproduction is studied. High School: The unity and diversity of life and the evolutionary mechanisms that contribute to the organization of living things are studied. MATERIALS: VOCABULARY: Engage • Comparing a Human and Avian Skeleton handout (1/student) • colored pencils Explore • Classification Challenge Cards • Classification Challenge Clan Sheet Explain • “Left, Right, Front and Back: Symmetry in Biology” (1/student) • • Elaborate • Computers with internet access and printer • colored pencils • Classy Buckeye Animals handout (1/student) Primary Levels of Organization Organs Organism Diverse body plans Internal structures Symmetry Extension Pictures of different phyla and classes of different organisms. Paper pieces for characteristic connectors. Secondary Physical Characteristics Behavioral Characteristics Traits Habitat Bilateral Radial Asymmetrical; no symmetry Cladogram Evolutionary Classification (classify) Common classroom procedures Copy Comparing a Human and Avian Skeleton 1/student Copy Classification Challenge Cards 1 set/2 students (reusable for multiple sections) Copy Classification Challenge Clan Sheet 1 for each pair of students SAFETY ADVANCED PREPARATION Objective: Students can make observations that very different animals can have similar structures. What is the teacher doing? What are the students doing? • ENGAGE (1-2 days) (What will draw students into the learning? How will you determine what your students already know about the topic? What can be done at this point to identify and address misconceptions? Where can connections are made to the real world?) Teacher asks students to turn 1. Students are recalling to a partner and name characteristics. characteristics that distinguish a human from a bird. • Teacher defines physical 2. Students distinguish physical characteristics (can be seen in characteristics from behavioral a preserved specimen) from ones. behavioral characteristics (can only be observed in a living specimen), and asks students to give examples. • Distribute “Comparing a Human and Avian Skeleton” handout. • Direct student pairs to take 3. Students read a non-fiction text turns buddy reading the and respond to questions from selection and together agree the text. on the answers to the 4. Students label parts of the questions, before human and avian skeleton independently completing using terms and color coding. each item. • Teacher monitors the reading and response activity for comprehension. Objectives: Students can make observations of physical characteristics from pictures of species and classify them into groups based on shared traits. Students can infer the habitats of species based on how their adaptations can help them survive in specific environments. What is the teacher doing? • EXPLORE (1 day) (How will the concept be developed? How is this relevant to students’ lives? What can be done at this point to identify and address misconceptions?) • See Classification Challenge Teacher Resource Monitoring student progress and addressing misconceptions. What are the students doing? 1. Making observations of physical characteristics possessed by species. 2. Grouping species by shared characteristics. 3. Inferring the habitat of groups of species. 4. Writing conclusions of how species’ physical traits help them survive in their environments. Objectives: Students will learn the different types of symmetry found in animals and plants. Students will discover how scientists classify organisms. What is the teacher doing? • • • • EXPLAIN (2 days) (What products could the students develop and share? How will students share what they have learned? What can be done at this point to identify and address misconceptions?) Day • • • • • Project Symmetry in Biology video after asking students to find five physical characteristics mentioned in the song. http://youtu.be/9sD_wijMkkU Guide students’ reading of “Left, Right, Front and Back: Symmetry in Biology” Direct students to work in pairs to discuss and complete the accompanying worksheet. Students pairs finishing early might read Prentice Hall pp 4445 to name their created specie. Teacher uses explicit instruction Prentice Hall Life Science TE p. 43 (Instruct) to teach Why Do Scientists Classify? Teacher asks students to find a partner and buddy read Prentice Hall Life Science SE pp 42-43 Teacher monitors students as they read checking for understanding by asking essential questions (Why do scientists classify living things? To make it easier to study them : What characteristics may have been used to group the beetles in Figure 7? body shape, size, # legs, head shape, antennae, color.) Teacher projects or has students look at Fig. 10, p 46, “Classifying an Owl”) as he or she traces the owl through each level of classification. Teacher monitors understanding by asking question (Which pair is more similar owl/lion or owl/robin ? Why? both are birds) Distribute exit ticket. Homework or RICA article: What are the students doing? 1. Listening to a song about symmetry in biology to find examples of physical characteristics in organisms. 2. Reading “Left, Right, Front and Back: Symmetry in Biology” 3. Identifying symmetry in images of organisms 4. Students create imagined specie. 5. Students Apply learning to teacher supplied examples. 6. Students read and take notes to answer 7. Students answer questions for the teacher to assess learning. Homework or RICA article: http://www.decodedscience.com/a nimal-body-plans-symmetry-inaction/13171 Objective: • Students can research Ohio species to find the taxonomy of particular species. • Students can create a cladogram. What is the teacher doing? ELABORATE (2 days) (How will the new knowledge be reinforced, transferred to new and unique situations, or integrated with related concepts?) Day 6 • Distribute “Classy Buckeye Animals” (1/student) • Introduce the task after assessing that the students can follow the classification string in the example. • Monitor students, looking for misconceptions as they complete the task. Day 7 • Distribute “CLADOGRAM ANALYSIS”. • Guide the students as you read and complete Part 1 with them. • Divide the class into pairs and have them work to complete Part 2 as you monitor their progress. What are the students doing? 1. Researching an Ohio animal, using the internet. 2. Finding the taxonomy (classification) of an animal. 3. Creating an informational miniposter. 4. Students read to find out about cladograms. 5. Students choose characteristics used to distinguish species. 6. Students create a cladogram with a partner. Objective: The objective of the assessments is to focus on and assess student knowledge and growth to gain evidence of student learning or progress throughout the unit, and to become aware of students misconceptions related to EVALUATE (1 day and on-going) (What opportunities will students have to express their thinking? When will students reflect on what they have learned? How will you measure learning as it occurs? What evidence of student learning will you be looking for and/or collecting?) Formative How will you measure learning as it occurs? Written work, verbal responses, teacher created exit tickets and short cycle assessments will be used to monitor ongoing progress. Summative What evidence of learning will demonstrate to you that a student has met the learning objectives? Students label human and avian skeletons. Write conclusions of how physical traits help organisms survive in their environments. Answer questions. Create mini poster. Create a cladogram. EXTENSION/ INTERVENTION EXTENSION http://www.sheppardsoftware.com/c ontent/animals/kidscorner/classific ation/kc_class_again.htm http://www.ellenjmchenry.com/home school-freedownloads/lifesciencesgames/documents/Classic_Classific ation_Chart.pdf INTERVENTION Students can watch the video on how to make a cladogram. https://www.youtube.com/watch?v=4 6L_2RI1k3k (1 day or as needed) Common Student Misconceptions about Cells and other Living Things COMMON MISCONCEPTION Students may not understand that multi-cellular organisms are made up of different types of cells (blood, skin, neural, etc). Students believe that organisms contain cells rather than they are mostly made up of cells. Students may struggle with the concept that cells are the basic unit of life in which life processes occur as compared to multi-cellular processes (i.e. respiration) Strategies to address misconceptions: 1. Explain the different types of cells in a multi-cellular organism have common functions and parts. 2. Compare needs of macroscopic organisms with cell functions. Lower-level: Provide additional text resources that are appropriate for the reading level of the students. Instead of pairs, place the students in mixed groups. Higher-Level: Have students create their own cladograms. Have them compare phylogenetic trees with cladograms. DIFFERENTIATION Strategies for meeting the needs of all learners including gifted students, English Language Learners (ELL) and students with disabilities can be found at the following sites: ELL Learners: http://www.ode.state.oh.us/GD/DocumentManagement/DocumentDownload. aspx?DocumentID=105521 Gifted Learners: http://www.ode.state.oh.us/GD/DocumentManagement/DocumentDownload. aspx?DocumentID=105522 Students with Disabilities: http://www.education.ohio.gov/GD/DocumentManagement/DocumentDownl oad.aspx?DocumentID=105523 Textbook Resources: Prentice Hall Life Science pp 300-302 ADDITIONAL RESOURCES Websites: http://anthro.palomar.edu/animal/animal_1.htm Human vs. Avian Skeleton https://www.youtube.com/watch?v=EdVS2jTi790 Symmetry in biology https://www.boundless.com/biology/textbooks/boundless-biologytextbook/introduction-to-animal-diversity-27/features-used-to-classifyanimals-163/animal-characterization-based-on-body-symmetry-63411856/ Structural and Behavioral Adaptations http://www.nhptv.org/natureworks/nwep1.htm Movies/Videos: Animal Classification Video http://www.youtube.com/watch?v=LyNtR8Y1HSU&feature=share&list=PL 6EB38A0D980B438B How to Construct a Cladogram http://www.youtube.com/watch?v=46L_2RI1k3k&feature=share&list=PL6 EB38A0D980B438B Tree of Life http://www.wellcometreeoflife.org/interactive/ - excellent as class video Name ___________________________________Date__________Period___________ The avian (bird) skeleton has many features that resemble the human skeleton, and the majority of the bones are the same, they are only shaped different. When structures are similar in different organisms, they are called homologous. The main difference between the human and bird skeleton is that the bird's skeleton is adapted for flight. For instance, the bones of a bird are hollow which makes the skeleton lighter. The collarbone of the bird is fused for stability and is called the furculum. Color the bones as indicated below. The arm bones of the human consist of the humerus, the radius and the ulna. These bones are also found in the bird. On both skeletons, color the humerus (G) pink. Color the radius (F) green and the ulna (E) light green. Note the shape of the bones on the image labeled “forelimbs” and color them the same color as you did in the bird and human. The leg consists of a long femur, which attaches to the pelvis and then two bones of the lower leg. In the bird, these two bones: the tibia and fibula are fused together. In humans, they are separated. You are probably familiar with the tibia of the bird, that's the part you eat called the drumstick. When you eat the thigh of the bird, the bone within it is the femur. On both skeletons, color the pelvis (M) yellow, the femur (N) orange, and the tibia (O) light blue. On the human only, color the fibula (P) dark blue. Also on the human skeleton, the patella, also called the kneecap is visible. Color the patella (S) green. On the image labeled “hindlimbs” color the bones appropriately. A large cranium protects the head of both birds and humans. The upper jaw of the human, and the upper beak of the bird is composed of a bone called the maxilla. The lower jaw and lower beak is composed of a bone called the mandible. On both skeletons, color the cranium (A) red, the maxilla (B) grey, and the mandible (C) pink. The differences between the bird and human skeleton are very apparent in the pectoral girdle, which is the place where the forelimbs attach to the spine. The bird's forelimbs are wings and must have a strong support system. The collarbone of the bird is fused to form the furculum, or wishbone. The "shoulder blade" of the human is actually a bone called the scapula, birds have a scapula and they also have an additional shoulder bone called the corocoid. On both skeletons, color the scapula (K) dark brown. On the bird, color the furculum (J) black and the corocoid (L) light brown. On the human, color the collarbone (J) black. Another obvious difference between the human and bird skeleton is the shape and size of the sternum. A bird's sternum is large and positioned under the body - flight muscles attach to this bone. The ridge of the bird's sternum is called a keel. The ribs are attached to the spine and to the sternum. On both skeletons, color the sternum (H) red and the ribs (R) blue. On the bird, trace the edge of the sternum in green to show the keel (I). The vertebrae of the bird and human are similar except for the bone where the tail feathers attach, called the pygostyle. Humans have a tailbone that is similar, but it is not pictured. Color the vertebrae (D) yellow and the pygostyle (Q) purple. Examine the bones of the forelimbs and hind limbs. Color those bones the same as you did above. Finally, study the rat skeleton. You will find the same bones in a rat as you do on a human or a bird. Using the colors listed above, color the rat appropriately. You will need to figure out which bones are which based on their shape and their location. Good Luck! http://www.biologycorner.com/worksheets/comparing_avian_human.html Name ___________________________________________ Date _____________ Period_____ 1. Define homologous. 2. Name two ways in which the bird's skeleton is adapted for flight. 3. What bone is the drumstick? _________________ What bone is the wishbone? __________________________ 4. What two bones make up the bird's beak? _______________________________________ 5. What three bones make up the bird's forelimb? ____________________________________ What two bones make up the bird's hind limb? ____________________________________ 6. The pectoral girdle is the area of the skeleton that attaches the arm bones to the spine. In humans the pectoral girdle consists of the scapula and the clavicle (collarbone). What three bones make up the pectoral girdle of the bird? _______________________________________ 7. The patella is also called the ___________________________ 8. The “thigh” of the bird contains what bone? ___________________________ 9. What is the scientific name for the “shoulder blade”? _______________________ 10. The tail feathers attach to what bone? ___________________________ 11. List two bones you will find in a bird, but not in a human. 12. List two bones you will find in a human, but not in a bird. 13. How many bones are in a human’s leg? _______ In a bird’s? ________ How many bones are in a human’s arm? _______ In a bird’s wing? _________ The longest bone in the bird’s leg is the __________ In a humans? __________ 14. Identify this bone: _______________________ 15. Next to each letter on the human skeleton, write the name of the bone. http://www.biologycorner.com/worksheets/comparing_avian_human.htm http://www.biologycorner.com/worksheets/comparing_avian_human.html Columbus City Schools Curriculum Leadership and Development Science Department June 2013 Columbus City Schools Curriculum Leadership and Development Science Department June 2013 adapted from http://www.scilinks.org/Handlers/GoToWebsite.ashx?EntPt=EPW_POST_SCI&Enc=1&SiteID=YuXDu3yEP5os=&Scilink=YA0zUt3mfIZ+dGBMhwSRXCg== Left, Right, Front and Back: Symmetry in Biology Introduction: Animals and plants come in a great variety of shapes - but not every shape. We don't see people with three arms, elephants with one leg, or dogs with two mouths. Such organisms are biologically possible, but they would be so inefficient (think of the one-legged elephant) that Mother Nature never evolved them. The morphology (i.e. shape) of an organism has to be tuned to the environment it lives in. That's where symmetry enters the picture. Symmetrical objects are said to have a balanced and regular arrangement of parts. In biology, there are several kinds of symmetry. The kind of symmetry an organism has tells us a great deal about its life style and ecology. Vocabulary: Spherical symmetry - the symmetry of a bubble or tennis ball. Every plane extending through the center cuts the object into two identical halves. Some tiny protist plankton in the oceans have spherical symmetry. Why? They are too small to swim, so water currents tumble them about. Since they cannot orient themselves, they simply show the same face to the environment in all directions. Radial symmetry – the symmetry of a cylinder. There is a top and bottom, but the sides are circular. Any cut through the center along the top-bottom axis divides the cylinder into equal halves. Examples: some sponges, coral animals, jellyfish, and many plants. These organisms are sessile (can't move), sedentary (don't move much), or float helplessly in the water. Since they can't move by themselves, they look the same all around their sides. They have a top and bottom (one of which has the mouth) but no left or right. Columbus City Schools Curriculum Leadership and Development Science Department June 2013 Spherical symmetry (marine plankton) Radial symmetry (sea anemone) Five-fold radial symmetry (sea star) A variation on radial symmetry is the five-sided symmetry of sea stars, sea urchins, and their relatives. Bilateral symmetry – a single plane of symmetry extends from the anterior end (the head) to the posterior end (the tail), running through the midline of the body. The two sides of the organism are mirror halves. The great majority of animals have bilateral symmetry – worms, insects, vertebrates, people, you. Extra Info For an example of bilateral symmetry, just look at a classmate's face. In bilateral symmetry, all the features in the midline of the face are single, and all the features off to the side are paired. Thus, we have one nose, mouth, and tongue in the midline of our faces. Our eyes, ears, and nostrils are present in identical pairs off to the sides. Our teeth are in paired sets on the sides of the jaw. Face of typical classmate Mobile animals are nearly all bilaterally symmetrical. Movement – crawling, running, swimming, or flying – is most efficient when the animal has paired legs, fins, or wings on its sides. The nerves and muscles are easiest to coordinate in pairs. Bilateral symmetry and locomotion go together. What direction should an animal move in? The end that moves first into a new environment is the head or anterior end. Bringing up the rear is the tail or posterior end. Since the anterior end is the "exploratory" end, that is where the sense organs are – the organs of touch, sight, hearing, smell, and taste. To Columbus City Schools Curriculum Leadership and Development Science Department June 2013 control all that sensory machinery, the brain is also in the head (if its brain was in its tail, an animal would never figure out what was going on). Finally, an animal with a head and a tail will have a dorsal surface (the back) and a ventral surface (the belly). Bilateral symmetry is part of a package. The rest of the package is the anterior head with sensory structures and brain, a posterior tail, and both a dorsal and a ventral surface. Mosquito Ray Cougar Extra info Some animals and plants have no symmetry. Oysters, for example, have lumpy, irregular shells, although other bivalve clams are symmetrical. Plant stems and leaves have a degree of radial symmetry. Fir and spruce trees, including branches have a rough radial symmetry. The shells of most snails make a spiral pattern that has a definite shape, but no simple plane or axis of symmetry. The snail shell has no symmetry. A Christmas tree with radial symmetry. Names _____________________________________ Date_________________ Period ___ Columbus City Schools Curriculum Leadership and Development Science Department June 2013 Symmetry in Biology Worksheet Questions to answer: 1. a. What kind of symmetry does this warm, fuzzy animal have?__________________ b. Draw the plane of symmetry through the animal. 2. For each organism in the previous pictures, give the type of symmetry a. SEA STAR: _________________ d. RAY _________________ b. SNAIL: ________________ e. PINE TREE ________________ c. PLANKTON ________________ f. MOSQUITO ________________ 3. Imagine you are scientists who discovered a new specie. Draw this organism that might be discovered in the future. Label its characteristics. Describe the kind of symmetry this specie has. Columbus City Schools Curriculum Leadership and Development Science Department June 2013 Symmetry in Biology Worksheet – Answer Key 1. a. 2. a. radial d. bilateral b. none e. radial c. spherical f. bilateral Answers will vary, but must include a labeled drawing and a description of type of symmetry. 3. Bilateral b. (Students finishing earlier than others might read PH pp 44-45 and create a name for their species .) Columbus City Schools Curriculum Leadership and Development Science Department June 2013 Exit Ticket Name ___________________________ Date _______ Period ____ Look at the classification diagram on page 46. Do two members of the same class have more or fewer shared characteristics than members of the same family? ____________________________________________________________ How can you relate this to the non-scientific terms class (a group of students), and family (people you are related to)? Provide evidence to support your response. ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ Exit Ticket Name ___________________________ Date _______ Period ____ Look at the classification diagram on page 46. Do two members of the same class have more or fewer shared characteristics than members of the same family? _____________________________________________________________ How can you relate this to the non-scientific terms class (a group of students), and family (people you are related to)? Provide evidence to support your response. ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ Columbus City Schools Curriculum Leadership and Development Science Department June 2013 Classy Buckeye Animals Choose one of the following Ohio animals and research it. 1. Find an image of the animal and copy and paste it on a blank word processing document. 2. Complete the Classification chart below for your animal. The first two steps of the chart are done for you. Steps three and four only require you to circle the correct choice. You will find the answers to the last four steps in your research. 3. Add your animal’s classification, in the format of the example, to the document. 4. Find at least three interesting facts about your animal and add them as text boxes in your document. 5. Add a title to your document along with your name, date, and period. 6. Print your mini-poster and add color by drawing features of the animal’s habitat in the background. Use colored pencils. White-Tailed Deer Bull Frog Bug Cardinal Smallmouth Bass Black Racer Lady • Domain - Eukaryote • Kingdom - Animal • Phylum – Chordata (has a backbone) or Arthropoda (exoskeleton and segmented body) • Class- mammal, bird, reptile, amphibian, fish or insect • Order _______________________________ • Family ______________________________ • Genus ______________________________ • Species _____________________________ The domain is the broadest category, while species is the most specific category available. For example, the European Hare would be classified as follows: Eukaryote --> Animal --> Chordata --> Mammalia --> Lagomorpha --> Leporidae -> Lepus --> Lepus europaeus. Columbus City Schools Curriculum Leadership and Development Science Department June 2013 Animal Classification Answer Key http://en.wikipedia.org white-tailed deer Kingdom: Phylum: Class: Order: Family: Subfamily: Genus: Species: Bull Frog Animalia Chordata Mammalia Artiodactyla Cervidae Capreolinae Odocoileus O. virginianus Kingdom: Phylum: Subphylum: Class: Order: Family: Genus: Species: Animalia Chordata Vertebrata Amphibia Anura Ranidae Rana R. catesbeiana Cardinal Black Racer Kingdom: Phylum: Class: Order: Suborder: Family: Genus: Specie: Animalia Chordata Aves Passeriformes Passeri Cardinalidae Cardinalis Cardinalis cardinalis Kingdom: Phylum: Class: Order: Suborder: Family: Genus: Species: Animalia Chordata Reptilia Squamata Serpentes Colubridae Coluber C. constrictor Smallmouth Bass Lady Bug (aka Lady Bird) Kingdom: Phylum: Class: Order: Family: Genus: Species: Animalia Chordata Actinopterygii Perciformes Centrarchidae Micropterus M. dolomieu Columbus City Schools Curriculum Leadership and Development Science Department June 2013 Kingdom: Phylum: Class: Order: Suborder: Superfamily: Family: Animalia Arthropoda Insecta Coleoptera Polyphaga Cucujoidea Coccinellidae Name____________________________________ Date____________ Period____ CLADOGRAM ANALYSIS What is a cladogram? It is a diagram that depicts evolutionary relationships among groups. It is based on PHYLOGENY, which is the study of evolutionary relationships. Sometimes a cladogram is called a phylogenetic tree (though technically, there are minor differences between the two). In the past, biologists would group organisms based solely on their physical appearance. Today, with the advances in genetics and biochemistry, biologists can look more closely at individuals to discover their pattern of evolution, and group them accordingly - this strategy is called EVOLUTIONARY CLASSIFICATION CLADISTICS is form of analysis that looks at features of organisms that are considered "innovations", or newer features that serve some kind of purpose. (Think about what the word "innovation" means in regular language.) These characteristics appear in later organisms but not earlier ones and are called DERIVED CHARACTERS. PART I - Analyze the Cladogram Examine the sample cladogram, each letter on the diagram points to a derived character, or something different (or newer) than what was seen in previous groups. Match the letter to its character. Note: this cladogram was created for simplicity and understanding, it does not represent the established phylogeny for insects and their relatives. 1. ______ Wings ______ 6 Legs ______ Segmented Body ______ Double set of wings ______ Cerci (abdomenal appendages) ______ Crushing mouthparts ______ Legs ______ Curly Antennae http://www.biologycorner.com/worksheets/cladogram.html Columbus City Schools Curriculum Leadership and Development Science Department June 2013 2. 3. 4. 5. 6. 7. 8. PART II - Create Your Own Cladogram To make a cladogram, you must first look at the animals you are studying and establish characteristics that they share and ones that are unique to each group. Select five animals in separate phyla or classes from the previous classification exercise and fill them in the row headings on the left of the chart. Then fill the column headings with characteristics that some share but can also make unique distinctions between the animals you have chosen. Finally, draw a cladogram to show the evolutionary relationships of these organisms. Why did you choose these characteristics? How do these characteristics show the difference in the various bodies’ complexities? DRAWING OF YOUR CLADOGRAM Defend your reasoning for the order in which you placed the animals on the cladogram. Columbus City Schools Curriculum Leadership and Development Science Department June 2013 Name__________KEY_________________ Date____________ Period____ CLADOGRAM ANALYSIS What is a cladogram? It is a diagram that depicts evolutionary relationships among groups. It is based on PHYLOGENY, which is the study of evolutionary relationships. Sometimes a cladogram is called a phylogenetic tree (though technically, there are minor differences between the two). In the past, biologists would group organisms based solely on their physical appearance. Today, with the advances in genetics and biochemistry, biologists can look more closely at individuals to discover their pattern of evolution, and group them accordingly - this strategy is called EVOLUTIONARY CLASSIFICATION CLADISTICS is form of analysis that looks at features of organisms that are considered "innovations", or newer features that serve some kind of purpose. (Think about what the word "innovation" means in regular language.) These characteristics appear in later organisms but not earlier ones and are called DERIVED CHARACTERS. PART I - Analyze the Cladogram Examine the sample cladogram, each letter on the diagram points to a derived character, or something different (or newer) than what was seen in previous groups. Match the letter to its character. Note: this cladogram was created for simplicity and understanding, it does not represent the established phylogeny for insects and their relatives. 1. __F__ Wings __C__ 6 Legs __A___ Segmented Body __G___ Double set of wings __E___ Cerci (abdominal appendages) __D__ Crushing mouthparts __B__ Legs __H___ Curly Antennae http://www.biologycorner.com/worksheets/cladogram.html Columbus City Schools Curriculum Leadership and Development Science Department June 2013 2. 3. 4. 5. 6. 7. 8. PART II - Create Your Own Cladogram To make a cladogram, you must first look at the animals you are studying and establish characteristics that they share and ones that are unique to each group. Select five animals in separate phyla or classes from the previous classification exercise and fill them in the row headings on the left of the chart. Then fill the column headings with characteristics that some share but can also make unique distinctions between the animals you have chosen. Finally, draw a cladogram to show the evolutionary relationships of these organisms. Backbone Eyes Warm blooded Bilateral symmetry Sea star Housefly Gecko Organ systems Sea sponge Bear Why did you choose these characteristics? How do these characteristics show the difference in the various bodies’ complexities? Answers will vary but characteristics should be chosen that show a progression in the complexity of body systems. Bear Gecko DRAWING OF YOUR CLADOGRAM Housefly Sea Star Sea Sponge EXAMPLE Defend your reasoning for the order in which you placed the animals on the cladogram. Answers will vary but student should be able to explain that as the animal are placed from left to right the complexity of their body arrangements increase or that they show evidence of higher evolutionary classification. Columbus City Schools Curriculum Leadership and Development Science Department June 2013
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