The species which are in danger of extinction are known as?

Which of the following is the correct sequence of phases of Biotic succession ?

In mycorrhizal association, the advantage of plant is:

With reference to lichens, which of the following statements is/are correct? 1. Lichens are very good indicators of pollution. 2. Lichens grow well in polluted areas.

The process of breaking down organic matter by micro organisms is called

Plants and animals that live on land are called