Describe process of fertilization.

Explanation

Fertilization : The process of two similar or dissimilar gametes is called as syngamy as a result diploid zygote is formed.
There are two types of fertilization.
External fertilization : In this type of fertilization, syngamy occurs outside the body of organism. Example - in most aquatic organisms like algae, fish, amphibians.
The major disadvantage of external fertilization is they produce a large number of offsprings but the offsprings are vulnerable to predators.
Internal fertilization : ..Syngamy occurs inside the body of organism. Example - fungi, birds, mammals.
Male gametes are released close to the female gametes where they fuses to form zygote.