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In gymnosperms : 1. The pollen grain is released from the microsporangium. 2. Pollen grains are carried in air currents and come in contact with the opening of the ovules borne on megasporophylls. 3. The pollen tube carrying the male gametes grows towards archegonia in the ovules and discharge their contents near the mouth of the archegonia. 4. Following fertilisation, zygote develops into an embryo and the ovules into seeds. 5.The seeds are not covered. Regarding 1,2,3,4 and 5:

( a ) All are correct
( b ) 1 is incorrect but 2,3,4 and 5 are correct
( c ) 2 is incorrect but 1,3,4 and 5 are correct
( d ) 3 is incorrect but 1,2,4 and 5 are correct

1 Answer

(A) is the right answer.

In gymnosperms : The pollen grain is released from the microsporangium. They are carried in air currents and come in contact with the opening of the ovules borne on megasporophylls. The pollen tube carrying the male gametes grows towards archegonia in the ovules and discharge their contents near the mouth of the archegonia. Following fertilisation, zygote develops into an embryo and the ovules into seeds. These seeds are not covered.
answered Mar 20, 2014 by pady_1
 

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