1.

What is fertilization? Distinguish between external fertilisation and internal fertilisation.

Answer»

Solution :FERTILISATION is defined as the fusion of a MALE gamete (Sperm) with a female gamete (an ovum or egg) to form a ZYGOTE during sexual reproduction.
External fertilisation :
The fusion of male gamete (sperm) and female gamete (ovum) occur outside the body.
Both individuals discharge their gametes outside the body.
DEVELOPMENT occurs outside the body.
Ex : frog. Internal fertilisation :
The fusion of gamates occurs inside the body
Only the male discharge sperm into female genital tract.
Development occurs inside the body. Ex: Humans, cattle ETC.


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