Animals have the innate ability to escape from predation. Select the incorrect example.
1. Color change in chameleon.
2. Poison fangs in snakes.
3. Melanin in moths.
4. Enlargement of body size by swallowing air in puffer fish.

Niche overlap indicates
1. active cooperation between two species.
2. two different parasites on the same host.
3. sharing resources between two species
4. mutualism between two species.

Annual migration does not occur in the case of
1. Salmon
2. Siberian crane.
3. Salamander.
4. arctic tern.

Exponential population growth is represented by
1. dt/dn=rN
2. dN/rN= dt
3. rN/dN= dt
4. dN/dt = rN

Praying mantis is a good example of
1. mullerianmimicary.
2. warning colouration.
3. social insect
4. camouflage.

Graph below is a diagrammatic representation of response of organisms to biotic factors. What do a,b,c represent respectively?


1. Partial regulator, conformer, regulator
2. Regulator, conformer, Partial regulator
3. Conformer, regulator, Partial, regulator
4. Regulator, Partial conformer, regulator

What type of human population is represented by the following age pyramid?

1. Expanding population
2. Vanishing population
3. Stable population
4. Declining population

Cuscuta is an example of
1. predation.
2. endoparasitism.
3. ectoparasitism.
4. brood parasitism.

A sedentary sea anemone gets attached to the sheel lining of hermit crab. The association is
1. ectoparasitism
2. symbiosis.
3. commensalism.
4. amensalism.

The following graph depicts changes in two populations (A and B) of herbivores in a grassy field. A possible reason for these changes is that

1. both plant populations in this habitat decreased.
2. population B competed more successfully for food than population A.
3. population A produced more offspring than population B.
4. population A consumed the members of population B.