Environmental Science MCQs

✅ The correct answer is option D.
The term “normal” refers to weather data averaged over thirty years.

✅ The correct answer is option C.
Profundal suffers from lack of light and therefore limited photosynthesis is able to take place.

✅ The correct answer is option D.
Ethanol is mixed with petrol for being used in automobiles.

✅ The correct answer is option A.
Fish reproductive strategy is not an indicative biological trait for the trait of ecology.

✅ The correct answer is option B.
Crustose lichen stage->Foilose lichen stage->moss stage->herb stage>shrub stage->forest stage (climax community).

✅ The correct answer is option B.
In India, the practice of clearing and burning the forest area for cultivation is known as jhum or jhoom. Slash-and-burn can be part of shifting cultivation, an agricultural system in which farmers routinely move from one cultivable area to another.

✅ The correct answer is option D.
Often before sunrise on a clear, calm, cold morning, ice (frost) can be seen on the top of parked cars, even when the air temperature is above freezing. This happens because the tops the tops of the cars are cooled by radiation.

✅ The correct answer is option A.
In a volume of air near the earth’s surface, nitrogen occupies 78 percent and oxygen nearly 21 percent.

✅ The correct answer is option A.
The development of a bare area without any life form is called Nudation.

✅ The correct answer is option B.
Mulch is any material that is spread or laid over the surface of the soil as a covering. It is used to retain moisture in the soil, suppress weeds, keep the soil cool, and make the garden bed look more attractive. Organic mulches also help improve the soil’s fertility, as they decompose.