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

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

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

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

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

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)

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

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

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

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

Answer: Option [C]

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