Environmental Science MCQs

✅ The correct answer is option A.

✅ The correct answer is option C.
Tropical deciduous trees shed their leaves in summers because the climate becomes hot and the leaves automatically become dry and shed off. Moreover they need to conserve water so that they can sustain in winters thus they shed their leaves.

✅ The correct answer is option C.
Lead exposure can have serious consequences for the health of children. At high levels of exposure, lead attacks the brain and central nervous system to cause coma, convulsions and even death. Children who survive severe lead poisoning may be left with mental retardation and behavioural disorders.

✅ The correct answer is option C.
Animals and plants are best protected in national parks.

✅ The correct answer is option C.
The oceans cover 71 percent of the Earth’s surface and contain 97 percent of the Earth’s water. Less than 1 percent of the Earth’s water is fresh water, and 2-3 percent is contained in glaciers and ice caps. The oceans contain 99 percent of the living space on the planet.

✅ The correct answer is option C.
Chemical reactions triggered by elevated temperatures transforms the organic material into hydrocarbons.

✅ The correct answer is option B.
An ecosystem must have continuous external source of energy.

✅ The correct answer is option B.
Coral reef in India found at Lakshadweep island,Gulf of Kutch,Gulf of Mannar and Andaman Islands, marine species and creatures like Dolphins, Sea-horse, Sea-cucumber, Sea-anemone,Dugong and sea turtle are the few wild animals of coral reefs found in India.

✅ The correct answer is option B.
Trichoderma harzianum has proved a useful microorganism for bioremediation of contaminated soils.

✅ The correct answer is option E.
Visible light is simply electromagnetic radiation in a range of wavelengths that our eyes are sensitive to. Visible wavelengths range from 0.0007 milimeters for red light, through orange, yellow, green, and blue, to 0.0004 milimeters for violet light. Ultraviolet is shorter wavelengths than violet.