Ncert Exercises & Solutions

During the process of ecological succession, the changes that take place in communities are

1. orderly and sequential

2. random

3. very quick

4. not influenced by the physical environment

Ans. (a) The gradual and predictable changes in the species composition of a given area are called ecological succession. These changes are orderly and sequential. The entire sequences of communities that successively change in a given area are termed as sere.

The other options as random or quick change are not the features of ecological succession. Also, ecological succession is influenced by the physical environment thus all the other options are wrong.

Page 250, XII NCERT

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