Choose the One Most Appropriate Answer for Each

question 15

Multiple Choice

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

• 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:

Independent Variable

In an experiment, the condition over which the experimenter has direct control.

Experimental Group

In an experiment, this is the group that receives the treatment or intervention being tested.

Control Group

In experimental research, a group of subjects not exposed to the treatment being studied, used as a baseline to measure the effect of the treatment.

Laboratory Experiment

A controlled study conducted in a specially equipped environment where variables can be manipulated and outcomes measured.