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

question 33

Multiple Choice

The event that triggers fruit formation is the growth of a pollen tube through the carpel of a flower.Which of the following would be a reasonable hypothesis about the basis of this effect?

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

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