Environmental Science MCQs

✅ The correct answer is option A.
Greenhouse effect, a warming of Earth’s surface and troposphere (the lowest layer of the atmosphere) caused by the presence of water vapour, carbon dioxide, methane, and certain other gases in the air. Of those gases, known as greenhouse gases, water vapour has the largest effect.

✅ The correct answer is option D.
Sunlight that bounces off a surface is said to be reflected from the surface.

✅ The correct answer is option D.
Coral reefs has maximum diversity.

✅ The correct answer is option A.
It happened at a Union Carbide subsidiary pesticide plant in the city of Bhopal, India. On the night of 2-3 December 1984, the plant released approximately 40 tonnes of toxic methyl isocyanate (MIC) gas, exposing more than 500,000 people to toxic gases.

✅ The correct answer is option B.
Black Buck is a deer.

✅ The correct answer is option B.
The layer of the ocean that receives light is called the photic zone. It is categorized into the euphotic and disphotic zone. Euphotic zone is the uppermost layer of the ocean where sufficient light for photosynthesis is found.

✅ The correct answer is option A.
The world’s biggest GHG emitter is China.

✅ The correct answer is option D.
Biophilia is the term coined by the Harvard naturalist Dr. Edward O. Wilson to describe what he saw as humanity’s “innate tendency to focus on life and lifelike processes,” and to be drawn toward nature, to feel an affinity for it, a love, a craving.

✅ The correct answer is option B.
Food webs consist of many interconnected food chains and are more realistic representation of consumption relationships in ecosystems.

✅ The correct answer is option C.
Producers and detritivores are absolutely essential functional component of the ecosystem.