Environmental Science MCQs

✅ The correct answer is option A.
Eutrophication most commonly arises from the oversupply of nutrients, most commonly as nitrogen or phosphorus, which leads to overgrowth of plants and algae in aquatic ecosystems. After such organisms die, bacterial degradation of their biomass results in oxygen consumption, thereby creating the state of hypoxia.

✅ The correct answer is option B.
Air pollution is likely to be most severe near the center of an anticyclone.

✅ The correct answer is option C.
The biggest award for environmental activities in India is given in the name of Indira Gandhi.

✅ The correct answer is option B.
The mean of annual rainfall in India is 110 cm.

✅ The correct answer is option A.
The United Nations Conference on the Human Environment was held in Stockholm, Sweden from June 5–16 in 1972.

✅ The correct answer is option B.
Evaporation refers to the process of heating liquid to the boiling point to remove water as vapour.

✅ The correct answer is option B.
A human population is small, there is a greater chance of genetic drift.

✅ The correct answer is option D.
When forests are destroyed, the atmosphere, water bodies, and the water table are all affected. Trees absorb and retain water in their roots. A large part of the water that circulates in the ecosystem of rainforests remains inside the plants. Some of this moisture is transpired into the atmosphere. When this process is broken, the atmosphere and water bodies begin to dry out. The watershed potential is compromised and less water will run through the rivers. Smaller lakes and streams that take water from these larger water bodies dry up.

✅ The correct answer is option A.
Conservation within the natural habitat is insitu conservation.

✅ The correct answer is option B.
A high density of elephant population in an area can result in intraspecific competition.