Question

Identify the correct sequence of structure of androecium in chronological order of development.

• A. Sporogenous tissue $ \rightarrow $ pollen grain $ \rightarrow $ microspore tetrad $ \rightarrow $ male gametes
• B. Sporogenous tissue $ \rightarrow $ microspore tetrad $ \rightarrow $ pollen grain $ \rightarrow $ male gametes.
• C. Pollen grain $ \rightarrow $ sporogenous tissue $ \rightarrow $ microspore tetrad $ \rightarrow $ male gametes
• D. Microspore tetrad $ \rightarrow $ sporogenous tissue $ \rightarrow $ pollen grain $ \rightarrow $ male gametes

Answer 1

Answer: (B)

A young anther consists of four microsporangia where there is compactly arranged cells called sporogenous tissue. As it develops, sporogenous tissue divides meiotically to form microspore tetrad which is arranged in a cluster. Then they mature and dehydrate and dissociate from each other to form pollen grains. As the pollen grains mature there are two male gametes, the vegetative cell and generative cell.