Q12 of 31 Page 1

Give reason:

(a) A liverwort plant is unable to complete its life cycle in a dry environment.


(b) Number of male gametes produced is much more than the female gametes produced.


(c) Organisms exhibiting external fertilization show great synchrony between the sexes and release a large number of gametes into surrounding medium.

(a) Male gametes are motile, they swim to the female gamete for fertilization. Without water ferilisation is not possible in liverworts.


(b) Large number of male gametes are produced to increase the chance of fertilization.


(c) In External fertilization, a large number of male gametes are destroyed after released in the surrounding medium. In order to compensate the loss, large number of gametes are released.


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