“When we conserve and protect the whole ecosystem, its biodiversity at all levels is protected.” This approach includes all of the following, excep

In this soil conservation method, several grasses are left out in soil after the crop is harvested.

Simlipal is

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

The dolphin found in Chilka lake is

How do scientists extrapolate the total number of species on Earth ?