Answer :

• Kangaroo rats are desert animal who have very well adapted themselves to the desert environment.

• They are able to meet all their water requirements through internal fat oxidation in which water is produced as a by-product.

• Their kidneys are very well adopted and have very long ‘loop of Henle’, which helps in water retention. The urine produced is concentrated and therefore water loss is minimal.

• Desert plants too, adapt well in extreme conditions.

• These plants are having long, deep roots which allows for better water absorption.

• Their leaves and stems are covered with thick cuticle and they have sunken stomata which help prevent excessive water loss.

• In Opuntia leaves are reduced to spines for water conservation.

• They also are having CAM pathway in which stomata is closed during the day time thus preventing excessive water loss through transpiration.

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