Which of the following can be a basis of difference between a salamander and a house-wall lizard apart from their habitat?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Scales on the skin.
A major difference between salamanders and house-wall lizards, aside from habitat, is their skin texture. Salamanders possess smooth, moist skin without scales, enabling them to breathe through their skin and live in damp environments. On the other hand, house-wall lizards have dry, scaly skin which protects them from dehydration and suits their life on walls and dry land. This fundamental difference in skin structure reflects their adaptation to different environments—amphibians needing moisture for respiration, and reptiles having scales to conserve water and provide protection.