Correct sequence of stages of succession on a bare rock is:
1) Lichens → Mosses → Grasses → Shrubs → Trees
2) Trees → Shrubs → Lichens → Mosses → Grasses
3) Mosses → Shrubs → Trees → Lichens → Grasses
4) Mosses → Lichens → Grasses → Shrubs → Trees.

Options

A. Lichens `rarr` Mosses `rarr` Grasses `rarr` Shrubs `rarr` Trees
B. Trees `rarr` Shrubs `rarr` Lichens `rarr` Mosses `rarr` Grasses
C. Mosses `rarr` Shrubs `rarr` Trees `rarr` Lichens `rarr` Grasses
D. Mosses `rarr` Lichens `rarr` Grasses `rarr` Shrubs `rarr` Trees.

Answer

A

Explanation

The various seral stagbes of lithosere (succession on bare rock) are as follows :
Lichens (Pioneer community) `to` Mosses `to` Annual grasses `to` Perennial grasses `to ` Shrubs ` to` Trees (Climax community).