Exam 2A%2c 06

Exam 2A%2c 06 - BTNY 210 Exam 2A Spring 2006 March 6 2006...

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BTNY 210 Name______________________________ Exam 2A Lab Day and Time____________________ Spring, 2006 March 6, 2006 1. True or False. All cells of the plant body, at least until the flower is formed, result from mitotic divisions and have exactly the same genetic makeup. 2. How does a leaf epidermal cell become different (structurally and functionally) from a leaf mesophyll cell? Multiple Choice: Choose the best answer. 3. The plant hormone best known for helping a plant respond to water stress is: a. abscisic acid b. auxin c. cytokinin d. ethylene e. gibberellic acid 4. When a chemical, physical, or environmental stimulus reaches a plant cell there is often a series of steps put into motion that cause a response in the plant. Examples of the types of stimuli include light of different colors, gravity, touch, and water stress. The series of steps involved in triggering the response is called: a. signal translocation b. signal transformation c. signal transduction d. signal transpiration e. signal perception For questions 5-8 you may choose the best answer from the following: a. ethylene b. gibberellin c. cytokinin d. abscisic acid e. auxin 5. The hormone that causes acidification of cell walls and allows for cell elongation by wall loosening 6. The hormone that induces the formation of alpha amylase in barley aleurone cells 7. The class of plant hormones frequently used as a broadleaf weed killer. 8. The plant hormone that directly affects stomatal closure in case of drought.
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BTNY 210, S06 Exam 2A 2 9. True or False. A “short day plant” is one that normally is induced to flower under day lengths that are equal to or less than 8 hours. 10.
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Exam 2A%2c 06 - BTNY 210 Exam 2A Spring 2006 March 6 2006...

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