Environmental Science MCQs

✅ The correct answer is option D.
Industrial melanism refers to the evolution of dark body colours in animal species that live in habitats blackened by industrial soot. The phenomenon has been documented in numerous species that hide from predators by blending in with their backgrounds. Peppered moths provide one example.

✅ The correct answer is option A.
Official date of Earth Day is on April 22.

✅ The correct answer is option D.

✅ The correct answer is option D.
Most non-renewable energy sources are fossil fuels: coal, petroleum, and natural gas. Carbon is the main element in fossil fuels. For this reason, the time period that fossil fuels formed (about 360-300 million years ago) is called the Carboniferous Period.

✅ The correct answer is option D.
The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers (9.3 to 21.7 mi) above Earth, although its thickness varies seasonally and geographically. The ozone layer was discovered in 1913 by the French physicists Charles Fabry and Henri Buisson.

✅ The correct answer is option A.
Mocked for Being a ‘Woman Studying Genetics,’ How Rachel Carson Got DDT Banned. Considered one of Carson’s most exceptional and groundbreaking books that marked a new public awareness about the use of chemical pesticides, especially DDT, Silent Spring was published on September 27, 1962.

✅ The correct answer is option B.
Mahatma Gandhi was well aware of such tendencies. Hence his advice to use the bounties of nature, but not with an element of greed. He firmly believed that the ‘Earth provides enough to satisfy every man’s need, but not for every man’s greed.’

✅ The correct answer is option A.
Low level ozone is referred to as tropospheric ozone.

✅ The correct answer is option D.
Pneumonia is an infection of the lungs that may be caused by bacteria, viruses, or fungi. The infection causes the lungs’ air sacs (alveoli) to become inflamed and fill up with fluid or pus. That can make it hard for the oxygen you breathe in to get into your bloodstream.

✅ The correct answer is option B.
The bell-shaped pyramid represents pre-reproductive and reproductive individuals which are basically the young individuals.