Statement I: Bioaccumulation is a process of progressive accumulation of heavy metals and pesticides in an organism. Statement II: Large fishes of the pond are found to have higher concentration of pesticides than planktons of the same pond.

With reference to the planet Earth, consider the following statements: I. Rain forests produce more oxygen than that produced by oceans. II. Marine phytoplankton and photosynthetic bacteria produce a…

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

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