Extinction of more than $200$ species of cichlid fish in Lake Victoria was due to the introduction of:

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.

Which of the following pairs of organisms represents alien species in India?

The most dramatic examples of habitat loss come from $:$

When a species becomes extinct,the plant and animal species associated with it in an obligatory way also become extinct. This phenomenon is known as:

Which of the following is known as the 'Terror of Bengal'?