Q1. “Flow of energy is unidirectional”. It means that—
(a) Energy always flows form east to west direction.
(b) The energy of the autotrophs reaches back to the solar input.
(c) Energy which passes to the higher trophic levels doesn’t come back to lower trophic levels
(d) None of these.
Q2. A food chain always starts with—
(a) Nitrogen fixation.
(b) Decomposition
(c) Respiration
(d) Photosynthesis
Q3. According to 10% law, the energy available to each successive level is _________ of previous level
(a) 1%
(b) 10%
(c) 100%
(d) None
Q4. The relationship between biotic and biotic environment is called—
(a) Biosphere
(b) Biome
(c) Ecosystem
(d) Community
Q5. The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about—
(a) 5%
(b) 10%
(c) 1%
(d) 8%
Q6. In an ecosystem, the 10% of energy available for transfer from one trophic level to the next trophic level is in the form of—
(a) Mechanical energy.
(b) Light energy
(c) Chemical energy
(d) Heat energy
Q7. Exposure to ultraviolet radiation causes eye disease like—
(a) Conjunctivitis
(b) Cataract
(c) Short sightedness
(d) Colour blindness
Q8. Accumulation of non-biodegradable pesticides in the food chains is increasing amount at each higher trophic level is known as—
(a) Accumulation
(b) Biomagnifications
(c) Pollution
(d) Eutrophication
Q9. Match the following with correct response.
List-I List-II
(1) Chlorofluoro carbons (A) Aerosols
(2) Green house gas (B) DDT
(3) Biomagnifications (C) Carbon dioxide
(4) Trans ducers (D) Green plants
(a) 1-B, 2-D, 3-A, 4-C
(b) 1-D, 2-A, 3-C, 4-B
(c) 1-A, 2-C, 3-B, 4-D
(d) 1-C, 2-B, 3-D, 4-A
Q10. Match the following with correct response.
List-I List-II
(1) A biotic component (A) Micro organisms
(2) Biotic component (B) Kills aquatic life
(3) Ozone depletion (C) Skin cancer
(4) Eutrophication (D) Light
(a) 1-C, 2-B, 3-D, 4-A
(b) 1-D, 2-A, 3-C, 4-B
(c) 1-A, 2-C, 3-B, 4-D
(d) 1-B, 2-D, 3-A, 4-C
SOLUTIONS
1.C
2.D
3.B
4.C
5.C
6.C
7.B
8.B
9.C
10.B
