Answer:
Organisms that take part in such process
produce large number of gametes because
(i) In external fertilization, there is
a great chance that the sperm and the eggs released by the organisms can be
affected by factors present in the environment like dessication ,predators,
etc. So, to make up for the high fatality rate of the gametes, the organism produces
a lot of gametes.
(ii) Producing large number of
gametes increase the chance for at least some eggs and sperms to meet in the
environment ensuring that atleast a stable number of off spring are able to
survive and carry on.
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