Question

Cacti can survive in desert because:

a. It has a flat green stem to store water and prepare food by photosynthesis.
b. The stem is covered with a thick layer of waxy substance, which helps to prevent evaporation of water.
c. The roots are distributed on the surface to absorb water.
d. Leaves are modified into spines to prevent loss of water.

• A. Both a and b are wrong.
• B. Both b and c are wrong.
• C. a is wrong but b is correct.
• D. a, b and d are correct.

Answer 1

The correct option is D a, b and d are correct.

Cactus survive in deserts due to following adaptations:
It has a flat green stem to store water and prepare food by photosynthesis. The stem is also covered with a thick waxy layer, which helps to retain water. Its roots go deep into the soil for absorbing water. Leaves turn into spines to prevent loss of water.