Question

How has cactus modified itself to live in a desert ?

short answer​

Answer 1

Because regular leaves don't conserve water well, the cactus developed these modified leaves to adapt to its extremely dry environment. The spines are better at conserving water and surviving in hot temperatures. ... The spines actually collect moisture from the air and let it drip down to the roots of the cactus.

The primary reason why cacti survive in that ecosystem is because of their numerous adaptations, which include: The leaves of this plant are reduced to needle-like structures referred to as spines that limit water loss, which could occur during the process of transpiration.