UPSC PYQPrelims 2021

Civil Services Examination · Question 20

In the nature, which of the following is/are most likely to be found surviving on a surface without soil? 1. Fern 2. Lichen 3. Moss 4. Mushroom Select the correct answer using the code given below.

  1. 1 and 4 only
  2. 2 only
  3. 2 and 3
  4. 1, 3 and 4
Show answer & explanation

Answer: (C) 2 and 3

Explanation

Lichens and mosses are pioneer species that colonise bare rock. Ferns and mushrooms need soil or organic matter.