Question

In the list of animals given below, hen is the odd one out.
Human being, Cow, Dog, Hen
The reason for this is ___________.

• A. it undergoes internal fertilisation
• B. it is oviparous
• C. it is viviparous
• D. it undergoes external fertilisation

Answer 1

The correct option is B it is oviparous

• Hen is the odd one out because it is oviparous, i.e., it lays eggs from which young ones are hatched later. However, the fertilisation process occurs within the female body so it is called internal fertilisation.
• Human being, cow and dog are viviparous, i.e., give birth to young ones, here as well fertilisation occurs within the female body.
• In external fertilisation, fertilisation takes place outside the female body in an external medium.For example: Frogs