Environmental Factors, Biodiversity and Ecosystem

In the aquatic ecosystem of a pond, which of the following components is represented by fungi, bacteria and flagellates ?

Ozone layer thickness is measured in :

The area that acts as a boundary or a transition zone between two ecosystems is known as

Which of the following regions of our country is known as a "HotSpot of Biodiversity"?

Corbett Tiger Reserve is located in which Indian State ?