Discussion
Consider the following four conditions (A to D) and select the correct pair of adaptations to environment in desert lizards.
A. Burrowing in soil to escape high temperature.
B. Losing heat rapidly from the body during high temperature.
C. Bask in sun when temperature is low.
D. Insulating body due to thick fatty dermis.
Choose the correct answer from the options given below :
Answer: C
The adaptations are A and C, so the answer is A and C.
Lizards are cold-blooded: they cannot generate much body heat, so they regulate their temperature by behaviour. When it is hot, desert lizards burrow into the soil to escape the heat (A), and when it is cool they bask in the sun to warm up (C).
Losing heat rapidly through the body (B) and insulation by a thick fatty layer (D) are physiological methods used by warm-blooded animals such as mammals, not by desert lizards. Every option containing B or D is therefore wrong.
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