What is the structure produced in the anthers of a flower that contains the male gamete?

The structure produced in the anthers of a flower that contains the male gamete is indeed a pollen grain. Pollen grains are produced through the process of meiosis in the anthers and contain the male gametes (sperm cells) necessary for fertilization. Each pollen grain represents a male reproductive cell that can be transferred to the stigma of a flower during pollination, leading to potential fertilization of the ovule.

In contrast, a flower bud refers to an undeveloped flower that has not yet opened, while a seed is the product of fertilization, containing an embryo and a food supply, essential for the development of a new plant. The stamen is the male reproductive part of a flower that includes the anther and filament, but it is not specifically the structure that directly contains the male gamete. Thus, the pollen grain is the precise answer to the question regarding the male gamete produced in the anthers.