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

Q.12 Climax community is in a state of

1. non-equilibrium

2. equilibrium

3. disorder

4. constant change

The sequence of communities of primary succession in water is

Q.18 The zone at the edge of a lake or ocean which is alternatively exposed to
air and immersed in water is called

1. pelagic zone

2. benthic zone

3. lentic zone

4. littoral zone

Q.19 Edaphic factor refers to

1. water

2. soil

3. relative humidity

4. altitude