Define external fertilization. Mention its disadvantages.

Define external fertilisation. Mention its disadvantages.

Define external fertilisation. Mention its disadvantages.

Define external fertilisation. Mention its disadvantages.

Define external fertilisation. Mention its disadvantages.

Define external fertilisation. Mention its disadvantages.

Give reasons for the following: Compared to internal fertilization, external fertilization is disadvantageous to the animal.

Give reasons for the following: a. Compared to internal fertilization the external fertilization is disadvantageous to the animal. b. Chances of survival of young ones are more in vivparous than in oviparous.

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