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.
Correct Answer:

Verified
Correct Answer:
Verified
Q28: Which of the following substances induces "bolting,"
Q29: Bush beans grow as small bushes rather
Q30: Salicylic acid,the main component of aspirin,may be
Q31: Grass shoots bend toward the light because,on
Q32: In leaf abscission,the abscission layer forms where
Q34: The most reliable way to stimulate branching
Q35: There is concern over the use of
Q36: In many grocery stores,fresh fruits are sold
Q37: Which of the following would be a
Q38: Which of the following hormones might induce