Question

Choose the correct from the alternatives given.
Which one of the following organisms is the first to colonise a bare rock?

• A. Lichens
• B. Mosses
• C. Perennial plants
• D. Metazoans

Answer 1

The correct option is A Lichens

Plant succession occurs on bare rocks is called Xerosere.

A.Lichens - These are the special type of plants formed by the association of algae and fungi. These are typically the first organisms to colonize bare rock. They are therefore the pioneer species in primary succession.

B.Mosses - These are one type of bryophytes formed after lichens

C.Perennial plants - These are angiosperms constitutes climax community in xerosere

So the correct option is 'lichens'.