An Evolutionary Timeline

Created by:
Amy Taylor
Hazelwood Central High School
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Teacher Page
• Grade Level: 10
• MAP Content Standards:
– The learner will be able to understand that
evidence for the nature and rates of evolution
can be seen in the anatomy and molecular
structure of living things.
– Organisms are classified into a hierarchy of
groups and subgroups, based on their structural
similarities and reflecting as much as possible
their evolutionary relationships.
• Tips for Classroom Use:
– Preview the activity before using it with your
class.
– Buttons are present on each page that will
enable you to move forward and back within
the activity.
• Journaling:
– This activity is intended to be used in
conjunction with journaling.
– The notebook icon will prompt the student
when to journal in their notebooks.
Focus on the process of
problem solving with your
student…they need to
understand not only the facts,
but the reasoning behind
them. Have them write their
thoughts on paper and then
discuss them as a class.
• Evolution: the
change in the gene
pool of a population
over time.
• In this activity you
will determine the
evolutionary order in
which various living
things evolved and
provide reasoning for
their evolution.
The Five Kingdom
System
(click on Kingdom for a review of characteristics)
• Kingdom Animalia
• Kingdom Fungi
• Kingdom Monera
• Kingdom Plantae
• Kingdom Protista
Kingdom Animalia
• Multicellular- made of more than one cell
• Eukaryotic- cells have a true nucleus and
membrane-bound organelles
• Cells lack cell walls
• Heterotrophic- are consumers…they get
their energy from another food source.
Kingdom Fungi
• Most are multicellular- made up of more
than one cell
• Eukaryotic
• All have cell walls made of chitin, a
complex carbohydrate.
• Heterotrophic
• Decomposers- specifically, they obtain
energy by feeding off dead or decaying
organic matter.
Kingdom Monera
• Unicellular
• prokaryotic- cells lack nuclei,
membrane bound organelles and
chromosomes
• have a cell wall made of
polysaccharides
• may be either heterotrophic or
autotrophic (make their own food)
• sometimes classified as 2 kingdoms:
archaebacteria and eubacteria.
Kingdom Plantae
•
•
•
•
Multicellular
eukaryotic
have cell walls made of cellulose
autotrophic
Kingdom Protista
•
•
•
•
The most diverse kingdom
unicellular
eukaryotic
may be autotrophic or heterotrophic
Using your knowledge of the five
kingdoms, hypothesize their
order of appearance on an
evolutionary timeline.
1.
2.
3.
4.
5.
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Here’s what scientists accept...
1. Kingdom Monera (3.5 billion years ago)
2. Kingdom Protista ( 1.5 billion years ago)
3. Kingdoms Fungi AND Plantae
(400 million years ago)
4. Kingdom Animalia (320 million years ago)
Explain why it is believed that the above
timeline best fits evolutionary theory.
Click on Kingdoms for an explanation
Why are Monerans believed to be
the first living things to evolve?
• Evolution generally supports a change from the
simple to the more complex…
– Prokaryotes exist earlier in the fossil record
than eukaryotes, which have organelle
specialization.
– Unicellular organisms before multicellular
organisms, having cell, tissue, and organ
specialization.
• Since some bacteria carry out photosynthesis, they
are believed to have produced the oxygen required
by many other organisms.
Why place Protists second?
They are eukaryotes…that means that
within their single cell, specialization has
occurred giving each part (organelle) a
specific function.
Fungi and Plants tie for third?
• Both are eukaryotic.
• Both are multicellular… a fairly recent
event that allows for further specialization
of cells and tissues.
• Together, they helped each other survive on
dry land…the plants made food and fungi
absorbed minerals thus providing the
neccessities for both. The move from sea to
land could not have occurred without this
mutualistic relationship.
Why is the Animal Kingdom
last?
• Eukaryotic, multicellular organisms…like
plants and fungi
• First appeared in fossil record shortly after
the plants
– Required plants for survival because animals
are heterotrophs. They rely on other organisms
for a food source whereas plants make their
own food.
– Also used the waste oxygen produced by plants
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