Environmental Science MCQs

✅ The correct answer is option A.
Himachal Pradesh proposed a ban on all types of polythene packing for the first time in India.

✅ The correct answer is option A.

✅ The correct answer is option C.
A radiation inversion is most commonly observed: just above the ground. Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by: the circulation of heat by the atmosphere and the oceans.

✅ The correct answer is option D.
A high BOD indicates the presence of a large number of microorganisms, which suggests a high level of pollution.

✅ The correct answer is option E.
The troposphere is the lowest layer of Earth’s atmosphere. Most of the mass (about 75-80%) of the atmosphere is in the troposphere. Most types of clouds are found in the troposphere, and almost all weather occurs within this layer.

✅ The correct answer is option B.
Germany is the first country to have phased out the CFCs and HCFCs which are responsible for the depletion of the ozone layer.

✅ The correct answer is option B.
The inherent ability of organisms to reproduce and multiply is called biotic potential.

✅ The correct answer is option A.
Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. The corresponding term for animal life is fauna. Flora, fauna, and other forms of life, such as fungi, are collectively referred to as biota.

✅ The correct answer is option D.
It is inverted in shape.

✅ The correct answer is option B.
A network of food chains existing together in an ecosystem is known as food web.