Assertion : Tropical rain forests are disappearing fast from developing countries such as India.

Reason : No value is attached to these forests because these are poor in biodiversity.

Define heliophytes and sciophytes.Name a plant from your locality that is either heliophyte or sciophyte.

Which one of the following words has been used by Prof. R. Misra for ecosystem

Transition zone between two community is called

The species of plants that play a vital role in controlling the relative abundance of other species in a community are called