warm up: okapi - bainbridge island school district...warm up: okapi native to the ituri rainforest,...
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Warm Up: OkapiNative to the Ituri Rainforest, located in the northeast of the Democratic Republic of the Congo, in Central Africa. Although the okapi bears striped markings reminiscent of the zebra, it is most closely related to the giraffe.
Today there are approximately 10,000–20,000 in the wild and as of 2011.
Question: What behaviors/adaptations of the okapi are like that of the giraffe?
http://video.nationalgeographic.com/video/animals/mammalsanimals/giraffesandokapi/okapi/
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AP Biology1. Warm Up 5 2. Finish Lab Investigation/Flower Dissection Activity 3. Discuss Lab as a Class.4. Chapter 39 Notes
AnnouncementsDue Friday, April 19: Week 10 Spring Assignments and Transpiration Lab
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Transpiration LabHow many stomata are on a plant?
Count stomata then answer questions.
Complete the following on separate pieces of paper:Answer Getting Started Questions 1 4 (S137 S138)
Step 1: Questions a h. (S138 S139)
Step 2: Complete Questions/Tasks f k (S140)
We will discuss Designing and Conducting Your own Experiment as a class.
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Flower Dissection Activity
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Lab Groups Period 2 Group 1 Group 5
Close Matthew Chaffee Lynn
Greason Nathaniel Teiche Anna
Haught Natassja Feikes Joshua
Group 2 Group 6
Reichert Alison Faust David
Ma JulianaFrancine Heater Trevor
Shor Ryann Haskin Tess
Group 3 Group 7
Wellman Georgia List Bailey
Pardy Kendra Williams Nicholas
Griffiths Julia Martin Jacob
Group 4 Group 8
McNett Maia Greason Maureen
Ran Elise Green Brett
Freedman Benjamin Conlon Rose
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Lab Groups Period 4 Group 1 Group 5
Block Carissa Chaffee Michael
Dolese Reed Bouillon Leah
Bolejack Madison Easley Kyra
Group 2 Group 6
Goessman Christina Bartsch Joe
Greer Jeremy Kallas Samuel
Faqihi Eman Nimb Ena
Loleas Andreas Mazur Julia
Group 3 Group 7
Shea Gregory
Juckniess Connor
Lee Tiffany
Group 4 Group 8
Weisner Dain
Schardein Max
Terry Ivy
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Transpiration Lab Discussion
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Chapter 39 Notes: Plant Responses to Internal and External Signals
I. Signal Transduction and Plant Responses
a. A signal transduction pathway couples _________________ of a stimulus with ________________ of the organism to the stimulus.
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 stimulus
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 activity of certain enzymes
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Apical Dominance
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II. Plant Responses to Hormonesa. General Information
i. Hormones are relatively _________ moleculesii. They are produced by one part of the organism and translocated to _________ parts (trigger responses in target cells and tissues) iii. __________ quantities are required to induce big changesiv. A reaction depends on the ____________ concentrations of the hormone(s)
b. The Discovery of a Plant Hormone…Auxini. Darwin and Darwin (Figure 39.4)ii. Boysen‐Jensen (Figure 39.4)iii. ____________ (Figure 39.5)
c. Examples (See Table 39.1)i. _________ eg) IAA
1. stimulate 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 growii. _________ eg) Zeatin
1. stimulate cell _______ and slows aging2. move up plant via xylem3. w/auxin….high CK, low auxin= axillary bud growth low CK, high auxin =
_________ dominance
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Ethylene Mutants
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iii. ______________ eg) GA31. promote seed and bud fruit growth2. act antagonistically w/abscisic acid
iv. Abscisic Acid eg) ABA1. inhibits growth and maintains seed ________________2. causes stomata to ____________
v. ___________ (a gas)1. promotes fruit ___________ and leaf abscission2. plays a role in senescence (aging)
vi. Brassinosteroids1. induce cell elongation and division in stem segments2. retard leaf abscission and promote xylem differentiation3. act in same ways as ___________
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I. ______periodism‐ a physiological response to day length
a. Control of flowering (Figure 39.22)Short day plants require night period _________ than a critical 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 interruption
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IV. Plant Movementsa. Tropisms‐ growth responses (differential rate of elongation)
1. _____________ ‐ light cells on _______ side elongate faster2. _____________ ‐ gravity3. ______________‐ touch
b. Turgor Movements (reversible; occur via __________ movement)1. Rapid leaf movements2. Sleep movements
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Exit Questions:
Identify one plant hormone.
RemindersDue Friday, April 19: Week 10 Spring Assignments and Transpiration Lab