why cacti grow in desert give reasons
Answers
Because it doesn't need much water as it's a xerophyte.
Answer:
Like all living things, cacti need water to survive. Given the areas where they live, though, water is often scarce. To compensate, cacti have developed special abilities that allow them to conserve the water they do receive and make it last a long time.
For example, the prickly spines of cacti are actually highly-modified leaves. Spines protect cacti from animals that eat plants and also help to reduce water loss by restricting air flow near the cactus.
Most cacti have extensive, but shallow root systems that allow them to soak up any rainfall that may come their way. Specialized stems allow cacti to store water for a long time, since rainfall is often sporadic in the deserts that cacti call home.