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In gymnosperms : 1. The megaspore mother cell divides mitotically to form four megaspores. 2. All the four megaspores are enclosed within the megasporangium (nucellus) develop into a multicellular female gametophyte 3. Female gametophyte bears one archegonium or female *** organ. 4. The multicellular female gametophyte is also retained within megasporangium. Regarding 1,2,3 and 4:

( a ) 4 is correct; 1,2 and 3 are incorrect
( b ) 2 and 4 are incorrect; 1 and 3 are correct
( c ) 1 and 2 are incorrect; 3 and 4 are correct
( d ) 3 is incorrect; 1,2 and 4 are correct

1 Answer

(A) is the right answer.

In gymnosperms : The megaspore mother cell divides meiotically to form four megaspores. One of the megaspores enclosed within the megasporangium (nucellus) develops into a multicellular female gametophyte that bears two or more archegonia or female *** organs. The multicellular female gametophyte is also retained within megasporangium.
answered Jan 6, 2014 by pady_1
 

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