During self-pollination in seed plants, pollen grains A. swim to female reproductive structures through water. B. must be carried from a male cone or flower to a female cone or flower. C. carry zygotes to the female structures, which form the seeds. D. are carried to female reproductive structures by wind or animals.

Answer:B

Explanation:In flowering plants, pollination is defined as the placement or transfer of pollen from the anther to the stigma of the same flower or another flower. In seed bearing plants (gymnosperms) pollination involves the transfer from the male cone to the female cone. The pollen germinates to form the pollen tube and the sperm to fertilize the egg upon transfer.