Define external fertilization. Mention its disadvantages.

Double fertilization is

Fertilisation in some organisms occur outside the body.Name that kind of fertilization. Write its disadvantages.

In terrestrial organisms like birds and reptiles, internal fertilization take place While some aquatic organisms show external fertilisation What is the disadvantage of external fertilization

Fertilisation in some organisms occur outside the body. Name that kind of fertilisation. Write its disadvantage.

Fertilization is synonym with