Warm ­ Up: Venus Flytrap
https://www.youtube.com/watch?v=tUDiDAbY3F8 The Venus flytrap (also Venus's flytrap or Venus' flytrap), Dionaea muscipula, is a carnivorous plant native to subtropical wetlands on the East Coast of the United States. It catches its prey—chiefly insects and arachnids— with a trapping structure formed by the terminal portion of each of the plant's leaves and is triggered by tiny hairs on their inner surfaces. When an insect or spider crawling along the leaves contacts a hair, the trap closes if a different hair is contacted within twenty seconds of the first strike. The requirement of redundant triggering in this mechanism serves as a safeguard against a waste of energy in trapping objects with no nutritional value. The Venus flytrap is a small plant whose structure can be described as a rosette of four to seven leaves, which arise from a short subterranean stem that is actually a bulb­like object. Each stem reaches a maximum size of about three to ten centimeters, depending on the time of year; longer leaves with robust traps are usually formed after flowering. 1
AP Biology Agenda
1. Warm­Up ­5
2. Turn in Week Assignments ­5
3. Chapter 39 Notes ­40
4. Transpiration Lab/Flower Lab ­50
5. Start Week Assignments ­10
Announcements
Due Today: Week 9 Spring Assignments and complete "Getting Started" of Transpiration Lab.
Due April 18: Week 10 Spring Assignments
Unit 5 Test out of 68 instead of 70 points
Quiz Monday! ­ Questions will be from end of chapters 35, 36, and 39.
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Chapter 39 Notes
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I.
Signal Transducon and Plant Responses
a. A signal transducon pathway couples _________________ of a smulus with ________________ of the organism to the smulus
b. 3 stages of cell‐signaling process (Figure 39.2)
i.
______________ ‐ target cells have receptors that are proteins that undergo changes in shape in response to a specific smulus
ii. _______________ ‐ small internally produced chemicals (second messengers) transfer and amplify the signal from the receptor to proteins that cause the specific response
iii. ________________ ‐ usually involves the increased acvity of certain enzymes
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II. Plant Responses to Hormones
a. General Informaon
i.
Hormones are relavely _________ molecules
ii. They are produced by one part of the organism and translocated to _________ parts (trigger responses in target cells and ssues) iii. __________ quanes are required to induce big changes
iv. A reacon depends on the ____________ concentraons of the hormone(s)
b. The Discovery of a Plant Hormone…Auxin
i.
Darwin and Darwin (Figure 39.4)
ii. Boysen‐Jensen (Figure 39.4)
iii. ____________ (Figure 39.5)
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c. Examples (See Table 39.1)
i.
_________
eg) IAA
1. smulate cell ________________ in shoots and roots 2. transported via carrier proteins and____ pumps 3. Acid‐growth hypothesis (Figure 39.7)
Auxin à H + Pumps à ______ pHà walls breakà water rushes inà cells grow
ii. __________
eg) Zean
1. smulate cell _______ and slows aging
2. move up plant via xylem
3. w/auxin….high CK, low auxin= axillary bud growth low CK, high auxin = _________ dominance
iii. ______________ eg) GA3
1. promote seed and bud fruit growth
2. act antagoniscally w/abscisic acid
iv. Abscisic Acid
eg) ABA
1. inhibits growth and maintains seed ________________
2. causes stomata to ____________ v. ___________ (a gas)
1. promotes fruit ___________ and leaf abscission
2. plays a role in senescence (aging)
vi. Brassinosteroids
1. induce cell elongaon and division in stem segments
2. retard leaf abscission and promote xylem differenaon
act in same ways as ___________
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Apical dominance 13
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phototropism 15
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III. ______periodism‐ a physiological response to day length
a. Control of flowering (Figure 39.22)
Short day plants require night period _________ than a crical lengthà fall flowering
b. __________ send photoperiod message to buds to flower (florigen?)
c. __________ (a photoreceptor)Red lightà Pr interrupts night length, Far red lightà Pfr negates interrupon
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IV. Plant Movements
a. Tropisms‐ growth responses (differenal rate of elongaon)
1. _____________ ‐ light cells on _______ side elongate faster
2. _____________ ‐ gravity
3. ______________‐ touch
b. Turgor Movements (reversible; occur via __________ movement)
1. Rapid leaf movements
2. Sleep movements
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1. Thrips are insects that feed on rose pollen. Scientists noted that the thrips population increased in the spring and decreased dramatically
during the summer. The researchers hypothesized that food abundance was the limiting factor for the population. Which of the following types of
data would be most useful for the scientists to collect at regular intervals on a designated test plot of rose plants?
(A) Amount of sunlight (hours/day)
(B) Mean temperature (C)
(C) Density of rose pollen produced (g/m2)
(D) Amount of pollen produced by each
flower (g/flower)
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1. C
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2. Students in a class measured the mass of various living organisms. They then kept the organisms in the dark for 24 hours before remeasuring them. None of the organisms were provided with nutrients during the 24­hour period. Which of the following is the best explanation for the pattern of change in mass of the organisms over time?
(A) Water loss due to evaporation
(B) Cellular respiration
(C) The law of conservation of matter
(D) Growth and reproduction
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2. B
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Lab Investigation Directions
Cover a small patch of a fern frond with nail polish according to directions
Flower dissection (10) ­ view parts in dissecting scope complete worksheet
Stem dissection (5) ­ answer question 3 in Getting Started, use dissecting scopes Stomata counting (40) ­ Answer questions through page 6
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P2
Group 1
Group 5
Covert
Emma
Golovleva
Alina
Opalski
Samantha
Dronkert
Emilia
Schulz
Gabriel
Pecunies
Christopher
Easterbrook Amelia
Ketcheside
Madeline
Group 2
Group 6
Bombardier Nathan
Aber
Rachael
Williams
Carolyn
Chiado
Julia
Edwards
Catherine
Keet
Curs
Green
Haley
Harper
Ausn
Group 3
Group 7
Thomas
Madison
Collins
Sarah
Madigan
Grace
Mitchell
Andrea
Wortley
Kyra
Schneiderma
Hannah
n
Moncada
Seraphine
Group 4
Shor
Miller
Karreman
Nancy
Duncan
Morgan
Larson
Indigo
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P4
Group 1
Group 5
Bigongiari
Emma
Fling
Alexander
Carley
Christy
Holzer
Alyssa
Butler
Maxsena
Deussen
Raya
Cinamon
Anna
Sawyer
Genevieve
Group 2
Group 6
McMillan
Anthony
Stephens
Amy
Alpaugh
Spencer
Fawley
Peter
Gregoire
Riley
Larson
Sarah
Group 3
Group 7
Mooney
Nicholas
Wise
Alison
Lesh
Mila
Ischer
Julianne
Dieterich
Oskar
Purdy
Grace
Alpaugh
Kathryn
Komok
Justeen
Group 4
Group 8
Tolley
Nicholas
Weleson
Robert
Boad
Grayden
Starbuck
Bailey
Derry
Alexander
Gao
Katherine
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Period 6
Group 1
Group 5
Fay
Brian
Fearey
Jack
Marn
Lauren
Perry
Rachel
Shea
Mallory
Yearous
Emma
Erickson
Frances
Group 2
Group 6
Holt
Audrey
Myrick
Hannah
Rice
Sarah
Curs
Keet
Dore
Samantha
McCormick‐
Riley
Dekker
Group 3
Group 7
Kraus
Carter
Cunningham Conor
McCassey
Eryn
Jenkins
David
Mather
Emily
Gleason
Megan
Group 4
Schweizer
Rachael
Ogden
Holt
Turpen
Sara
McCready
Aidan
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Exit Question
What is the female part of the flower called?
Reminders
Due Today: Week 9 Spring Assignments and complete "Getting Started" of Transpiration Lab.
Due April 18: Week 10 Spring Assignments
Unit 5 Test out of 68 instead of 70 points
Quiz Monday! ­ Questions will be from end of chapters 35, 36, and 39.
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