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?

Question

Quizplus · Accepted Answer

In a fertilized angiosperm, the energy is stored in the endosperm, which is formed by the fusion of the second sperm cell with the diploid central cell of the female gametophyte. The endosperm serves as a source of nutrients for the developing embryo, similar to how the female gametophyte in gymnosperms stockpiles food for the embryo. Therefore, option A, endosperm, is the best choice.

Double Fertilization Reduces the Energetic Cost of Reproduction