Question

Pick the odd-one-out from each of the groups given below on the basis of respiratory organs. Give a reason for your answer.

• A. Lizard
• B. Cow
• C. Earthworm
• D. Snake

Answer 1

The correct option is C

Earthworm

The correct option is C.

Explanation of correct option

1. Earthworms have moist skin.
2. They respire through their skin.

Explanation of incorrect option

Option A

1. A lizard is a reptile that lives on land and has lungs for respiration.
2. Their lungs are very efficient with more surface area for gaseous exchange.

Option B

1. Cows are terrestrial mammals.
2. They have lungs for respiration.

Option D

1. Most snakes have lungs.
2. They have a nasal cavity, glottis, trachea, bronchi, lungs, and air sacs for respiration.

Hence, earthworm is the odd one out from the given options on the basis of respiratory organs.