Adaptation of cactus in desert are as follows :
(i) It has roots long that penetrate deep inside the soil in search water.
(ii) It has fleshy stems to store water the stem is also covered with the thick waxy layer that helps to retain water.
(iii) They lose their leaves due to the high temperature their leaves.
(iv) Leaf is replaced by spine to reduce transpiration.
(v) Photosynthesis is carried out by the stems.