Question

Question 12: Define external fertilization. Mention its disadvantages.

Class 12 - Biology - Reproduction in Organisms Page 18

Answer 1

there will be no security to gamets and zygote

Answer 2

Hey there,

As we know there are two types of fertilization :-

(1) Internal fertilization
(2) External fertilization

So let's talk about external fertilization.

→ External fertilization is a process in which fertilization takes place outside the mother's worm.

For example :- Frog , Fishes ,etc

→ External fertilization takes place in water bodies.

→ Parents lays eggs and development and fertilization of it takes place in water bodies.

Disadvantages :-

→ No security of living of eggs produced.

→ Less possiblity of fertilization.

→ Bigger fishes too produce hurdles for eggs and sperm, maybe eat them in the way.

→ No protection of young ones.

Thanks!