Question

Aquatic animals in which fertilisation occurs in water are said to be______.

• A. viviparous without fertilisation
• B. oviparous with external fertilisation
• C. viviparous with internal fertilisation
• D. oviparous with internal fertilisation

Answer 1

The correct option is B oviparous with external fertilisation

• Organisms that lay eggs are called oviparous and are commonly seen in aquatic animals like frogs.
• In frogs, female releases eggs in water, similarly the male releases sperms and fusion of egg and sperm i.e., fertilisation occurs in water.
• As the fertilisation occurs outside the female body, in external medium i.e., water thus it is called external fertilisation.
• Whereas those which give birth to young ones are called viviparous organisms. Where fertilisation occurs within the female body.