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: -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-3: -In majority of angiosperms, the pollen grains are shed from the anther at the bicelled (2-celled) stage.

Detailed explanation-4: -anther, in flowering plants, the part of a stamen that produces and contains pollen. Each anther is generally borne at the tip of a long slender stalk known as a filament and consists of two lobes that each house a pair of pollen sacs (microsporangia) that produce pollen for pollination.

Detailed explanation-5: -The male part of flowering plants is the stamen. This consists of an anther supported by a single stalk, the filament. The anther usually contains four pollen sacs which are responsible for producing pollen grains.