Question

A common trait between fishes, amphibians and reptiles is:

• A. Laying of eggs
• B. Shelled eggs
• C. Gills
• D. Scales

Answer 1

The correct option is A Laying of eggs

1. Fishes, amphibians, and reptiles all lay eggs, but only reptiles lay shelled eggs as they are terrestrial animals.
2. Fish possess gills and scales. Scales are the outer covering of fish and reptiles.
3. Reptiles respire through the lungs.
4. Amphibians do not have scales.

• Thus, the correct answer is option A.