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In gymnosperms : 1. The microspores develop into a male gametophytic generation 2. Male gametophytic generation is highly reduced and is confined to a unicellular form. 3. The reduced gametophyte is called a pollen grain. 4. The development of pollen grains take place outside the microsporangia.

( a ) 4 is incorrect; 1,2 and 3 are correct
( b ) 3 is incorrect; 1,2 and 4 are correct
( c ) 1 and 2 are correct; 3 and 4 are incorrect
( d ) 2 and 4 are incorrect; 1 and 3 are correct
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(D) is the right answer.

In gymnosperms : The microspores develop into a male gametophytic generation which is highly reduced and is confined to only a limited number of cells. This reduced gametophyte is called a pollen grain. The development of pollen grains take place within the microsporangia.
answered Mar 20, 2014 by pady_1
 

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