How is acactus adapted to survive in a desert?

A cactusis able to survive in the desert as it is adapted to the hot andhumid conditions of the desert. To survive in a desert, the cactushas the following adaptations:

(i) It has long roots that go deep inside the soil for absorbingwater.

(ii) Its leaves are present in the form of spines to prevent waterloss through transpiration.

(iii) Itsstem is covered with a thick waxy layer to retain water.