The Event That Triggers Fruit Formation Is the Growth of a Pollen

question 32

Multiple Choice

The event that triggers fruit formation is the growth of a pollen tube through the carpel of a flower. Identify a reasonable hypothesis about the basis of this effect.

• A) Pollen tubes grow in response to a cytokinin produced by the carpel.
• B) Pollen tubes grow in response to abscisic acid.
• C) The growing pollen tube produces ethylene.
• D) The growing pollen tube produces auxins and/or gibberellins.

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Definitions:

Vertical Distance

The measure of the difference in height between two points, often used in mathematics and geography.

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The cost per unit of quantity of a product, allowing consumers to compare prices between different sized packages of the same item.

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The difference between a firm's total revenues and its total costs, including both explicit and implicit costs, representing the additional gain above the next best alternative investment.