UPSC CSE Prelims
Question 8
Which of the following leaf modifications occurs/occur in desert areas to inhibit water loss?
- Hard and waxy leaves
- Tiny leaves or no leaves
- Thorns instead of leaves
Select the correct answer using the codes given below.
View correct answer and explanation
Correct answer: D
Correct Option: D
Explanation: Desert plants limit transpiration with protective leaf surfaces, minimal leaf area and spines replacing leaves.
Statement/Pair-wise Analysis:
Statement/Item 1: Correct - Thick, hard or waxy surfaces slow evaporative water loss.
Statement/Item 2: Correct - Small or absent leaves minimise exposed transpiring area.
Statement/Item 3: Correct - Spines are modified leaves that reduce exposed leaf surface and also deter grazing.
Option-wise Analysis:
A: Incorrect - excludes true item 3.
B: Incorrect - excludes true items 1, 3.
C: Incorrect - excludes true item 2.
D: Correct - selects all and only the accurate statements/pairs.