In angiosperms, each pollen grain produces two sperm. what do these sperm do? in angiosperms, each pollen grain produces two sperm. what do these sperm do?
a. one fertilizes an egg, and the other is kept in reserve.
b. both sperm fertilize a single egg cell.
c. one fertilizes an egg, and the other fertilizes the fruit.
d. each one fertilizes a separate egg cell.
e. one fertilizes an egg, and the other combines with two polar nuclei, which develop into stored food cells (endosperm).

The correct answer will be option-E.

Explanation:

In angiosperms, the fertilization of male and female gametes occurs through a process called double fertilization.

The male gametes produces two sperm cells while the female gametophyte is 8 celled structure in which 3 cells are known as antipodal cells, 2 cells known as polar cells, 2 cells are synergids and 1 cell is egg cell.

During double fertilization, a zygote is formed when one sperm of the male gamete fuses with the egg cell and one sperm cell fuses with the 2 polar nuclei of the central cells which forms a triploid structure called endosperm which provides nutrition to the growing embryo.

Thus, option-E is the correct answer.