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Question

Behavioural means to cope environmental variations include:

A
Secretion of solid urine by kangaroo rat
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B
Increase in red blood cell production at high altitude
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C
Desert lizard bask in sunlight when temperature drops below the comfort zone
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D
Leaves reduced to spines in Opuntia
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Solution

The correct option is C Desert lizard bask in sunlight when temperature drops below the comfort zone
Desert lizards bask in the sun and absorb heat when their body temperature drops below the comfort zone and move into shade when the ambient temperature starts increasing. Some species are capable of burrowing into the soil to hide and escape from the above-ground heat. They lack physiological ability and manage to keep their body temperature fairly constant by behavioural means.

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