What structure in a flower is responsible for producing pollen?

The stamen is the structure in a flower that is responsible for producing pollen. It is composed of two main parts: the anther and the filament. The anther is the part of the stamen that produces and holds the pollen grains, which contain the male gametes necessary for reproduction in flowering plants. During the process of pollination, pollen is transferred from the anther to a stigma, often leading to fertilization.

Understanding the roles of other structures helps clarify why the stamen is the correct answer. The carpel (or pistil, which refers to the female reproductive structure) consists of the ovary, style, and stigma, and is primarily responsible for producing ovules. Petals are not involved in reproduction directly; instead, their role is to attract pollinators with their colors and shapes. This distinction highlights the specific functions of various flower parts and emphasizes the stamen's critical role in reproduction through pollen production.