Exam 22: Reproduction and Development of Flowering Plants

The type of fruit derived from one flower with many separate carpels is a(n)_____________ fruit.

A seed is an embryo and its food supply is inside a seed coat.

Abscisic acid is a plant hormone that activates a plant's defenses against predators.

You plant a seed in a pot containing soil,and then add water and place the pot under a light.After the seedling emerged,complete with two green leaves,the carbon dioxide levels decreased in the closed chamber.This indicated that _________ was occurring.

Double fertilization reduces the energetic cost of reproduction.In gymnosperms,the female gametophyte stockpiles food for the embryo in advance of fertilization.The investment is wasted if no zygote ever forms.In contrast,double fertilization ensures that an angiosperm devotes energy to the zygote only if sperm fertilizes egg.Where is this energy stored in a fertilized angiosperm?