Question

how cactus plants are adapted to live in the desert ?

Answer 1

1.Their leaves are modified into spines to minimize the lose of water
2.They are spongy and hollow to store more water
3. Their stem has chlorophyll to perform photosynthesis  

Answer 2

Cacti do not have leaves, but instead have a fixed spine. The fixed spine loses less water than leaves, so the plant can photosynthesize throughout the dry season. Cacti have very shallow roots to soak up water immediately after rainfall.