Choose the One Most Appropriate Answer for Each

question 19

Multiple Choice

Choose the one most appropriate answer for each. Each letter will be used once.
-phytochrome

• A)growth response that orients parts of a plant in a direction influenced by light
• B)burst of hydrogen peroxide and nitric oxide that causes infected cells to commit suicide
• C)an organism's response to changes in length of day relative to night
• D)organelle involved in sensing gravity
• E)light-sensitive pigment that helps set plant circadian rhythm based on length of night
• F)flowering after a long season of cold temperatures
• G)closes stomata in times of stress
• H)initiates fruit ripening in nearby fruits
• I)flowers only when hours of darkness fall below a critical value
• J)flavonoid in cocoa responsible for the unusual absence of heart disease in the Kuna
• K)occurring on a 24-hour cycle
• L)flowers only when hours of darkness are greater than some critical value
• M)activates systemic acquired resistance
• N)inhibits the growth of lateral roots
• O)mobilizes food reserves in germinating seeds

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Definitions:

Birth Control

Methods, devices, or medications used to prevent pregnancy.

Luteinizing Hormone

A hormone produced by the pituitary gland that triggers ovulation and stimulates the production of progesterone in females, and testosterone in males.

Follicle-Stimulating Hormone

A hormone secreted by the anterior pituitary gland that stimulates the growth of ovarian follicles in females and the production of sperm in males.

Menstrual Cycle

A regular natural change that occurs in the female reproductive system, making pregnancy possible.