Civil Services Prep

Prelims 2018 · Science and Technology · Question 2

Which of the following leaf modifications occur(s) in the desert areas to inhibit water loss?<br/>1. Hard and waxy leaves<br/>2. Tiny leaves<br/>3. Thorns instead of leaves<br/><br/>Select the correct answer using the code given below:

  1. 2 and 3 only
  2. 2 only
  3. 3 only
  4. 1, 2 and 3

Answer

1, 2 and 3

1. Hard and waxy leaves — Desert plants often have a thick cuticle/waxy coating that reduces transpiration. Correct.

2. Tiny leaves — Small leaves reduce surface area and hence water loss. Correct.

3. Thorns instead of leaves — In many xerophytes, leaves are modified into spines/thorns to minimize transpiration. Correct.

Hence, all three modifications help inhibit water loss in desert areas.

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