HORTICULTURE

Detailed explanation-1: -Anther, contains pollen grains but pollen grains are produced in pollen sac. Pollen sac is the structure in seed plants in which pollen is produced. In angiosperms there are usually four pollen sacs in each anther; they contain the microspore mother cells. Therefore, it is the correct answer.

Detailed explanation-2: -Angiosperm pollen is produced in the anther, a floral structure that is typically made up of two pairs of fused microsporangia (microspore-producing sporangia, also called pollen sacs).

Detailed explanation-3: -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.

Detailed explanation-4: -Through the process of meiosis, pollen is formed in the pollen sacs (microsporangia) inside the anthers of a flower. The anther, while it is developing from anther primordium (undifferentiated cells), forms two clusters of cells.

Detailed explanation-5: -In majority of angiosperms, the pollen grains are shed from the anther at the bicelled (2-celled) stage.