The most serious negative impact of loss of biodiversity on humans would be due to:
1. global warming and ozone depletion.
2. loss of ecosystem services.
3. loss of source of genetic diversity to preserve endangered species.
4. loss of species for ʺbioprospecting.ʺ

Habitat loss and fragmentation lead to loss of biodiversity primarily because:
1. less plants in fragmented habitats leads to less photosynthesis.
2. more soil erosion takes place in fragmented habitats.
3. smaller populations in fragmented habitats are more prone to extinction.
4. animals migrate out of smaller habitat fragments.

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.

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

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

The type of species that will most likely be supported by small parks will be:

Which of the following is a biocide that was first to be used on a large scale?

The most effective biologic control of insects is achieved by:

We all know that water hyacinth is an invasive plant that has caused havoc in many water bodies in our country. But it has some usefulness as well. This includes:
I. Substrate for biogas production
II. Bio cleaning of industrial waters
III. Source of effective antipyretic

Exploring molecular, genetic and species-level diversity for products of economic importance is called as: