Question

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



cockroach, grasshopper, snail, ant







lizard, cow, earthworm, snake







crocodile, whale, dolphin, fish







snake, tadpole, crow, goat

Answer 1

1 =snail. 2=cow. 3=crocodile. 4=tadepole.

Answer 2

ODD-ONE-OUT:

A. The odd one out is snail. This is because a snail breathes through pulmonata whereas the others breathe through spiracles.

B. Cow is the odd one out. This is because a cow breathes using its lungs. The other organisms breathe through their skin.  

C. Fish is odd one out. Fish breathe with the help of gills whereas whale, dolphin and crocodile breathe using lungs.

D. Tadpole is the odd one out because it breathes using gills. The other animals breathe through lungs.