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Environmental Science Objective Questions and Answers for Competitive Exams

(1) The pollination of maize takes place by
[A] pollination by air
[B] self-pollination
[C] pollination by rain
[D] pollination by insects

Comment

Answer: Option [A]
(2) Exobiology deals with the study of:
[A] external characters of living organisms
[B] life in the outer layers of atmosphere
[C] life on the surface of the earth
[D] life in other planets and space

Comment

Answer: Option [D]

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(3) Oxygen liberated during photosynthesis is coming from:
[A] Atmosphere
[B] Water
[C] Carbon dioxide
[D] Break down of chlorophyll

Comment

Answer: Option [B]
(4) During photosynthesis the liberated gas is:
[A] Hydrogen
[B] Nitrogen
[C] Oxygen
[D] Carbon dioxide

Comment

Answer: Option [C]
(5) The ‘Theory of Evolution’ was put forward by
[A] Aristotle
[B] Louis Pasteur
[C] Gregor Mendel
[D] Charles Darwin

Comment

Answer: Option [D]
(6) Which of the following weeds has been found useless to check water pollution caused by industrial affluent?
[A] Parthenium
[B] Elephant grass
[C] Water hyacinth
[D] Both (A) and (B)

Comment

Answer: Option [C]
(7) Which are the largest fixator of solar energy?
[A] Green plants
[B] Fungi
[C] Protozoa
[D] Bacteria

Comment

Answer: Option [A]
(8) The carbon dioxide content in the air that we exhale is about
[A] 4%
[B] 8%
[C] 12%
[D] 16%

Comment

Answer: Option [A]
(9) Maximum harm to a tree is caused by
[A] Loss of its bark
[B] Loss of all leaves
[C] Loss of half of its leaves
[D] Loss of half of its branches

Comment

Answer: Option [B]
(10) Which of the following is a biodegradable waste?
[A] Nylon
[B] Plastics
[C] Wool
[D] Polythene bags

Comment

Answer: Option [C]

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