Answer:
(b) External fertilization occurs
outside the body of the organism. It takes place inmost aquatic organisms, such
as a majority of algae and fishes as well as amphibians .Organisms exhibiting
external fertilization release a large number of gametes in the surrounding
medium, (e.g., water) in order to enhance the chances of syngamy.
A major disadvantage is that the
offspring are extremely vulnerable to predators threatening their survival upto
adulthood.
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