Question

Which one of the following is surrounded by a callose wall ?

• A. Pollen grain
• B. Microspore mother cell
• C. Male gamete
• D. Egg

Answer 1

The correct option is B Microspore mother cell

The deposition of callus occurs around the Microspore Mother Cell (MMC) prior to the cell undergoing meiotic division. The division results in the formation of a cluster of 4 haploid cells the microspores. These cells are held together by the callose to form a microspore tetrad. The callose deposition allows the development of the microspores into pollen grains by preventing them from sticking to each other. After complete development of the pollen the callose wall is disintegrated.

So, the correct answer is 'Microspore mother cell'