The biological community can have

1. An isolated population of plants which doesn't depend on animals and microbes

2. An isolated population of animals which doesn't depend on plants and microbes

3. An isolated population of microbes which doesn't depend on plants and animals

4. No isolated population is possible there.

By a particular interaction in a population, one species was benefited while others was not affected at all. Such interaction is called as

1. Commensalism

2. Mutualism

3. Vandalism

4. Competition

By a particular interaction in a population, one species was harmed while other was benefited. Such interaction is called as

1. Competition

2. Predation

3. Parasitism

4. Both 2 and 3

The interacting species live closely together in which of the following interaction?

1. Parasitism, Predation and Commensalism

2. Commensalism, Amensalism

3. Mutualism and Competition

4. Parasitism, Mutualism, Commensalism

Predation can be thought as

1. Prey's way to control its the population

2. Nature's way of transferring energy to higher trophic levels.

3. Nature's way of controlling predators food chain

4. Predator's way of controlling prey's energy level

In a broad ecological context, which of the following can be a predator?

1. Seed eating sparrow

2. Lion

3. Tiger

4. Crow

Predators cannot perform

1. conduit for energy transfer

2. control prey species

3. make the ecosystem stable

4. Keep a check on diversity of species

Why does the exotic species become invasive and start spreading fast?

1. It gets better nutrition there.

2. Because of the lack of competition from other exotic plants

3. Because of the lack of natural predator

4. Because of the successful establishment of the food web.

The prickly pear cactus introduced in Australia in the 1920s got famous because of the lack of which population interaction?

1. Competition

2. Predation

3. Parasitism

4. Amensalism

The invasiveness of prickly pear cactus in Australia was controlled by introducing a predator from its natural habitat and this predator was

1. A ladybird

2. A moth

3. A wasp

4. A desert fly