Question

Which of the following leaf modifications occur(s) in the desert areas to inhibit water loss?

1. Hard and waxy leaves

2. Tiny leaves

3. Thorns instead of leaves

Select the correct answer using the code given below:

(a) 2 and 3 only

(b) 2 only

(c) 3 only

(d) 1, 2 and 3

Answer 1

Correct option is (d) 1, 2 and 3

Thorn is not a 'leaf modification', it is an aerial modification of stem'. "Spine" is a leaf modification to protect the plant and help in reducing transpiration. So by elimination Answer should 'B'. However, mentioned that "Desert plants have few or no leaves, and the foliage is either waxy, leathery, hairy or needle shaped to reduce water loss through transpiration. Some of them are entirely leafless, with pricks or thrones." So accordingly Answer should be D.