Exotic alien introduced species can become invasive in the introduced ecosystem due to:
I. preying on native species.
II. out-competing native species for food, light, and breeding habitat.
III. lack of natural predators.

1.	Only I and II	2.	Only I and III
3.	Only II and III	4.	I, II and III

Overexploitation is one of the “evil quartet” that increases the risk of extinction mainly for the:
1. animals that feed on a lower trophic level
2. large animals with low intrinsic reproductive rates
3. aquatic animals
4. terrestrial organisms

The biggest factor for the ‘biodiversity crisis' that we face today is:
1. Global warming
2. Environmental pollution
3. Habitat loss and fragmentation
4. A large and increasing human population

Consider three sample areas with the following composition: 

Which area will be considered as the most diverse?
1. Sample area I
2. Sample area II
3. Sample area III
4. Sample area II and Sample area III are equally diverse

Regarding the gradients of biodiversity:

1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect

Plants are an important source of medicines for human use. Identify the incorrectly matched pair:

The pink headed duck has got extinct mainly due to:
1. Habitat destruction
2. Overexploitation
3. Alien invasion
4. Pollution

Identify the correct statements regarding the “EDGE” species:
I. They are the only survivor members of their genus or even higher taxon.
II. To increase their conservation many are designated as “focal” species
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II

The ‘Himalayan Quail’ got extinct due to:
1. Habitat destruction
2. Overexploitation
3. Alien invasion
4. Pollution

A bird that was previously thought to be extinct till its rediscovery in 1986 by Bharat Bhushan of Bombay Natural History Society is:
1. Great Indian Bustard
2. Jerdon’s Courser
3. White Peacock
4. Siberian crane