AP BIOLOGY

Detailed explanation-1: -The anther consists of four saclike structures (microsporangia ) that produce pollen for pollination. Small secretory structures, called nectaries, are often found at the base of the stamens; they provide food rewards for insect and bird pollinators.

Detailed explanation-2: -Microsporogenesis: Microspores are formed from microspore mother cells inside the anther. It is the process of formation of microspores from a pollen mother cell through meiosis division.

Detailed explanation-3: -Development of pollen grains (male gametophytes) takes place in the anther. Pollen development begins when specialized cells (microsporocytes) differentiate in young anthers. There are generally hundreds or thousands of microsporocytes per anther and each passes through meiosis to produce four haploid microspores.

Detailed explanation-4: -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-5: -The anthers are important because they help the flower to create pollen. Without the anthers of the flower producing pollen, the flower cannot reproduce. The filaments of the stamen hold the anthers up and away from the main body of the flower.