AP BIOLOGY

Detailed explanation-1: -Stamen: The pollen producing part of a flower, usually with a slender filament supporting the anther.

Detailed explanation-2: -The anther usually contains four pollen sacs which are responsible for producing pollen grains. Each pollen grain is a single cell containing two male gametes. Once mature, the anther splits open and pollen is released.

Detailed explanation-3: -Pollen is produced by cone-bearing and flowering plants as part of their reproduction process. In cone-bearing (gymnosperms) plants, pollen is produced in pollen cones. Flowering plants (angiosperms) produce pollen in the anthers within the flower.

Detailed explanation-4: -In angiosperms, pollen is produced by the anthers of the stamens in flowers. In gymnosperms, it is formed in the microsporophylls of the microstrobili (male pollen cones). Pollen consists of one or more vegetative cells and a reproductive cell. A pollen grain itself is not the male gamete.

Detailed explanation-5: -Final answer: Pollen grains are produced in anther.