In terrestrial organisms like birds and reptiles, internal fertilization take place While some aquatic organisms show external fertilisation
Name any two organisms showing external fertilization

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

In which of the following sets of organisms does the external fertilization occur?

During sexual reproduction fertilization is an important process.But in most aquatic organisms like fishes,amphibians etc.external fertilization occur.In most terrestrial organisms internal fertilization is common. Point out the differences between external and internal fertilization.

Assertion: Syngamy occurs in the external medium, i.e. the outside of the body of the organism is called external fertilisation. Reason: Syngamy occurs inside the body of organism is called internal fertilisation.

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

Name two animals showing internal fertilization. What are the characteristics of the gametes produced by such animals?

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