All ecosystems of the world combine to form.

Which one of the following is a tertiary consumer:

_________ atom is the principal building block of many kind of biomolecules.

In an ecosystem the flow of _________ is one way, while _________ is/are constantly recycled.

Which is tertiary carnivore.

Rabbit is a.

A group of organisms, similar to one another, which can interbreed in nature and produce fertile off springs.

Example of Ectoparasite is:

Identify the correctly matched pair.

The base of food chain is always formed by:

Abiotic component of ecosystem is.

An examples of carnivore plant is.

Which of the following is the abiotic component of an ecosystem?

When we eat the onion, our trophic level is;

Which of the following organisms are decomposers?

The favourable variations tend to be;

The type of symbiotic relationship in which one member get benefit and other is harmed is called:

Organisms that make their own food with help of sunlight, CO, and HO are called;

The conversion of ammonia to nitrates is carried out by soil bacteria. This process is called:

A network of all the feeding relationships in an ecosystem is called:

——– get solar energy and transform it into chemical energy by the process of photosynthesis.

The· materials flow from one trophic level to the next by means of;

A relationship between species in which both species benefit is called:

Which one of the following is not an example of fossil fuels?

Nitrogen is an important component of: