Our Environment
Which of the following is a biotic component of an ecosystem?
Which of the following groups contains only biodegradable items?
In a food chain, the flow of energy is always:
Depletion of the ozone layer is mainly caused by:
An artificial ecosystem among the following is:
According to the 10% law of energy transfer, how much energy is available to the next trophic level?
Which organisms constitute the first trophic level in a terrestrial food chain?
The accumulation of harmful chemicals in higher trophic levels is known as:
Which gas shields the surface of the Earth from harmful ultraviolet radiations?
Decomposers in an ecosystem include:
What happens to energy as it moves up the trophic levels in a food chain?
Which of the following is a non-biodegradable waste?
The term 'ecosystem' was coined by:
In an aquatic food chain, which of the following typically forms the base (first trophic level)?
What is the role of decomposers in an ecosystem?
Which international agreement successfully limited the production of CFCs worldwide?
Why is a food web more realistic than a food chain?
Chemical formula of ozone is:
Which of the following animals belongs to the category of producers?
What happens when disposable plastic cups are banned?
The depletion of the ozone layer is mainly caused by which of the following chemical compounds?
What is the primary function of the ozone layer in the upper atmosphere?
Which of the following is a non-biodegradable substance?
Which of the following is a non-biodegradable pollutant?