Question

describe the structure of a pollen grain​

Answer 1

Answer:

Pollen grains are microscopic structures that carry the male reproductive cell of plants. The inside of the grain contains cytoplasm along with the tube cell (which becomes the pollen tube) and the generative cell (which releases the sperm nuclei). The outer shell is made of two layers.

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Answer 2

Answer:

The androecium is the male reproductive whorl of the flower which produces male gametes. The stamen is the androecium composed of anther and filament . The anther contains pollen sac which produce pollen grains. The pollen grain is the male gametes. The pollen grain is the male gametophyte which contains the male gametes. The pollen grain is surrounded by the layers as exine which forms the outer layer and initine which forms the inner layer. The generative cell divides to form the two male gametes . The generative cell divides to form the two male gametes. The vegetative cell is responsible for the providing nutrition. The intine layer comes out of the germ pore to form the pollen tube

Explanation:

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