Explain the types of fertilization depending on the place of occurrence.

Explanation

Depending upon the place where the fertilization take place, it of two types.
(i) External fertilization: In external fertilization, the fusion of male and female gametes takes place outside the body of female organisms in the water medium.
E.g. sponges, fishes and amphibians.
(ii) Internal fertilization: In internal fertilization, the fusion of male and female gametes takes place within the body of female organisms. E.g. reptiles, aves and mammals.