Answer 1

(i) Desert lizard’s lack the physiological ability that mammals have to deal with the high temperatures of
their habitat.
(ii) But manage to keep their body temperature fairly constant by behavioural means.
(iii) They bask in the sun and absorb heat when their body temperature drops below the comfort zone, but move into shade when the ambient temperature starts increasing.
(iv) Some species are capable of burrowing into the soil to hide and escape from the above-ground heat.