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.

Question

Quizplus · Accepted Answer

Auxins and/or gibberellins produced by the growing pollen tube may stimulate growth and differentiation of the carpel tissues, leading to fruit formation.

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