A) 12 cells of antheridium +1 prothallial cell
B) 10 cell of antheridium + 3 prothallial cell
C) 9 cell of antheridium + 4 prothallial cell
D) 8 cells of antheridium + 6 prothallial cell
Correct Answer: A
Solution :
Microspores of Selaginella are haploid in nature. Each microspore divides by mitosis division and forms a small lens shaped prothallial cell and a large antheridial cell. Subsequent division only occur in antheridial cell which result of a 12 celled antheridium in which outer 8 cells form jacket of antheridium and inner 4 cells form primary androgonal cells. Thus mature microgametophyte contains 12 antheridial cells and 1 prothallial cell.
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