Question

Why aquatic organism releases vast number of eggs, and mention the type of fertilisation

seen in them ?​

Answer 1

Answer:

Most aquatic/amphibian animals need to lay a great number of eggs. In most frogs and toads, less than 25% of the eggs survive until hatching, and even less to adulthood. The common garden toad lays about 3–6,000 eggs. Only about 750–1,500 of them hatch.

In animals, there are two types of fertilisation, internal and external. Internal fertilisation happens in the female body. External fertilisation happens outside of the body. Mammals, birds, and reptiles use internal fertilisation