| Read the assertion and reason carefully: |
| Assertion : Tapetum helps in the liberation of microspores from tetrad. |
| Reason : Tapetum shows callose activity. |
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
E) If the assertion is false but reason is true
Correct Answer: A
Solution :
Mepham and Lane have demonstrated that in Tradescantia bracteata the plasmodial cytoplasm derived from the tapetum has callose activity. Shortly before callose degradation starts the cytoplasm of tapetal cells show certain vesicles which are probably associated with callose activity. This suggests that sporophytic tissue, presumably tapteum, is involved in the synthesis of callose enzyme for the release of microspores in a tetrad by degrading the callose wall.
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