Question

What is meant by the term 'internal fertilisation' and 'external fertilisation' ?

Explain with examples.

Answer 1

Internal fertilisation:

• Internal fertilisation refers to fertilisation that occurs within the female body.
• In internal fertilisation the male animals put his sperms into the female body. These sperms then fertilise the eggs inside her body. Example : In human beings.

External fertilisation:

• External fertilisation refers to fertilisation that occurs outside of the female body.
• In external fertilisation, the male and female animals release their sperms and eggs in water where fertilisation takes place. Example: In frogs.