Which of the following is a biotic factor?
The number of links in a food chain is:
The species that is threatened with extinction is called:
Aquatic microscopic animals are called:
Which of these is a biodegradable waste?
Greenhouse effect causes:
What is true of an ecosystem?
The sum total of the populations of the same kind of organisms constitute a:
____________ is any chemical substance that an organism requires to live.
The sum total of the variety of organisms in the biosphere is called:
The total amount of living tissue within a given trophic level is known as:
The term ‘detritivore’ includes:
Biodiversity’ is described as:
Which of these is a correct food chain?
What does a pyramid of biomass represent?
Bacteria and fungi serve an important role as:
The relationship between a human and a tapeworm is:
The arrows in a food chain represent:
A fish tank is an ecosystem because it includes:
__________feed on the waste material in an ecosystem including animal remains, animal faeces, and plant debris.