Ecosystem — DPP 1

20 NEET questions from Ecosystem, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

Attempt this test free 20 questions · 30 minutes · +80 marks
1
Of the total incident solar radiation, the proportion of PAR is: -
  1. A About $70 \%$
  2. B About $60 \%$
  3. C Less than $50 \%$
  4. D More than $80 \%$
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Correct answer: C

2
The importance of ecosystem lies in: -
  1. A Flow of energy
  2. B Cycling of materials
  3. C Both the above
  4. D None of the above
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Correct answer: C

3
Forests near equator region are called -
  1. A Deciduous
  2. B Tropical rain forests
  3. C Coniferous forests
  4. D Temperate forests
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Correct answer: B

4
Which of the following is included in decomposition?
  1. A Fragmentation
  2. B Leaching
  3. C Catabolism
  4. D All of the above
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Correct answer: D

5
Ecosystem may be defined as :-
  1. A A localized association of several plants and animals
  2. B Different communities of plants, animals and microbes together with their physico-chemical environment.
  3. C Different communities of plants and microbes along with their physicochemical environment
  4. D None of the above
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Correct answer: B

6
Primary productivity of plants in an ecosystem depends on :-
  1. A A variety of environmental factors
  2. B Availability of nutrients
  3. C Photosynthetic capacity of plants
  4. D All of the above
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Correct answer: D

7
In an ecosystem :-
  1. A Primary producers are more than primary consumers.
  2. B Primary consumers are always larger than primary producers.
  3. C Secondary consumers are always larger than primary producers.
  4. D Primary consumers are least depend on primary producers.
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Correct answer: A

8
A food chain starts from: -
  1. A Nitrogen fixing organisms
  2. B Photosynthetic organisms
  3. C Respiration
  4. D Decomposers
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Correct answer: B

9
Which one is omnivorous?
  1. A Cow
  2. B Lion
  3. C Deer
  4. D Man
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Correct answer: D

10
The bulk of nitrogen in nature is fixed by -
  1. A Lighting
  2. B Chemical industries
  3. C Denitrifying bacteria
  4. D Symbiotic bacteria
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Correct answer: D

11
Mass of living matter at a trophic level in an area at any time is called: -
  1. A Standing crop
  2. B Detritus
  3. C Humus
  4. D Standing state
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Correct answer: A

12
A plant, being eaten by a herbivore which in turn is eaten by a carnivore makes :-
  1. A Food chain
  2. B Web of Food
  3. C Omnivores
  4. D Interdependence
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Correct answer: A

13
Which one of the following is not a functional unit of an ecosystem: -
  1. A Productivity
  2. B Species diversity
  3. C Energy flow
  4. D Decomposition
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Correct answer: B

14
Which of the following is a manmade artificial ecosystem?
  1. A Grassland ecosystem
  2. B Forest ecosystem
  3. C Ecosystem of artificial lakes & dams
  4. D None of these
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Correct answer: C

15
The ecological pyramid of numbers in pond ecosystem is :-
  1. A Upright
  2. B Inverted
  3. C May upright or Inverted
  4. D First upright then inverted
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Correct answer: A

16
Which one of the following ecosystem types has the highest annual net primary productivity?
  1. A Temperate deciduous forest
  2. B Tropical rain forest
  3. C Tropical deciduous forest
  4. D Temperate evergreen forest
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Correct answer: B

17
With regard to ecological food chain, man is a :-
  1. A Consumer
  2. B Producer
  3. C Both consumer & producer
  4. D Decomposer
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Correct answer: A

18
The maximum energy is stored at which of the following trophic level in any ecosystem
  1. A Producers
  2. B Herbivores
  3. C Carnivores
  4. D Top carnivores
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Correct answer: A

19
Path of energy flow in an ecosystem is :-
  1. A Herbivorous $\rightarrow$ producer $\rightarrow$ carnivorous $\rightarrow$ decomposer
  2. B Herbivorous $\rightarrow$ carnivorous $\rightarrow$ producer $\rightarrow$ decomposer
  3. C Producer $\rightarrow$ carnivorous $\rightarrow$ herbivorous $\rightarrow$ decomposer
  4. D Producer $\rightarrow$ herbivorous $\rightarrow$ carnivorous $\rightarrow$ decomposer
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Correct answer: D

20
The breakdown of detritus into smaller particles by earthworm is a process called
  1. A Catabolism
  2. B Humification
  3. C Fragmentation
  4. D Mineralisation
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Correct answer: C

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