Organisms And Populations — DPP 3

20 NEET questions from Organisms And Populations, 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
When birth rate equals death rate;
  1. A a population grows rapidly.
  2. B the size of a population remains constant.
  3. C density-dependent limiting factors do not affect the population.
  4. D a population is in danger of extinction.
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Correct answer: B

2
Natural selection acts at;
  1. A organism level.
  2. B population level.
  3. C species level.
  4. D ecosystem level.
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Correct answer: B

3
Assertion (A): Predators in nature are 'prudent'.
Reason (R): Predators keep prey populations under control and also help in maintaining species diversity in a community.
  1. A Both Assertion (A) and Reason (R) are True and the Reason (R) is a correct explanation of the Assertion (A).
  2. B Both Assertion (A) and Reason (R) are True but Reason (R) is not a correct explanation of the Assertion (A).
  3. C Assertion (A) is True but the Reason (R) is False.
  4. D Assertion (A) is False but the Reason (R) is True.
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Correct answer: B

4
A broad-based, pyramid-shaped age-structure diagram is characteristic of a population that is;
  1. A growing rapidly.
  2. B at carrying capacity.
  3. C stable.
  4. D limited by density-dependent factors.
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Correct answer: A

5
The most appropriate measure of population density is generally;
  1. A number.
  2. B biomass.
  3. C percent cover.
  4. D all of these
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Correct answer: A

6
Match the List-I and List-II select the correct option.
Organisms And Populations – NEET-5466
  1. A A-R; B-Q; C-S; D-P
  2. B A-P; B-Q; C-R; D-S
  3. C A-Q; B-S; C-P; D-R
  4. D A-S; B-P; C-R; D-Q
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Correct answer: A

7
Match the List-I and List -II select the correct option.
Organisms And Populations – NEET-5464
  1. A A-S; B-R; C-P; D-Q
  2. B A-R; B-S; C-P; D-Q
  3. C A-R; B-S; C-Q; D-P
  4. D A-P; B-R; C-Q; D-S
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Correct answer: B

8
Which of following statements supports the Darwinian view of struggle of existence and survival of fittest?
  1. A Interspecific competition is a potent source of evolution.
  2. B Totally unrelated species might also compete.
  3. C Not always the resources are limiting in case of competition.
  4. D None of these
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Correct answer: A

9
Assertion (A): Camouflage is a defence mechanism that enables organisms to stay away from predators.
Reason (R): In camouflage, chemical substances are produced against the predator.
  1. A Both Assertion (A) and Reason (R) are True and the Reason (R) is a correct explanation of the Assertion (A).
  2. B Both Assertion (A) and Reason (R) are True but Reason (R) is not a correct explanation of the Assertion (A).
  3. C Assertion (A) is True but the Reason (R) is False.
  4. D Assertion (A) is False but the Reason (R) is True.
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Correct answer: C

10
Match the List-I and List -II select the correct option.
Organisms And Populations – NEET-5496
  1. A A-S; B-R; C-P; D-Q
  2. B A-R; B- S; C-P; D-Q
  3. C A-R; B-P; C-S; D-Q
  4. D A-Q; B-R; C- S; D- P
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Correct answer: D

11
Human cells contain mitochondria, which are responsible for producing the energy needed by our cells. Remember that the ancestors of mitochondria may once have been free living prokaryotes. If mitochondria were still considered to be separate organisms within our cells, which of the following would best describe our relationship with them?
  1. A Parasitic
  2. B Mutualistic
  3. C Competitive
  4. D Pathogenic
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Correct answer: B

12
Ecology is basically concerned with levels of biological organisation-organisms, populations, _______ and biomes.
  1. A Biosphere
  2. B communities
  3. C Habitat
  4. D Niche
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Correct answer: B

13
In a laboratory there were 40 fruitflies last week and during experiment 4 fruitflies died in a week. Calculate the death rate.
  1. A 0.1 individual of fruitfly per year.
  2. B 0.36 individual of fruitfly per week.
  3. C 0.4 individual of fruitfly per week.
  4. D 0.1 individual of fruitfly per week.
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Correct answer: D

14
A population grows rapidly at first and then levels off as carrying capacity if it is;
  1. A limited by density dependent factors.
  2. B limited by density independent factors.
  3. C affected by an opportunistic species.
  4. D relatively unaffected by limiting factors.
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Correct answer: A

15
Statement-I: cuscuta derives its nutrition from the host plant which it parasitizes.
Statement-II: The female mosquito is not considered a parasite, although it needs our blood for reproduction.
  1. A Both Statement-I and Statement-II are correct.
  2. B Both Statement-I and Statement-II are incorrect.
  3. C Statement-I is correct and Statement-II is incorrect.
  4. D Statement-I is incorrect and Statement-II is correct.
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Correct answer: A

16
Which is not an example of ectoparasitism?
  1. A Many marine fish are infested with ectoparasitic copepods.
  2. B Lice on humans.
  3. C Ticks on dogs.
  4. D Liver fluke in human.
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Correct answer: D

17
Assertion (A): The logistic growth model is considered a more realistic one.
Reason (R): Resources for growth of most animal populations are finite and become limiting sooner or later.
  1. A Both Assertion (A) and Reason (R) are True and the Reason (R) is a correct explanation of the Assertion (A).
  2. B Both Assertion (A) and Reason (R) are True but Reason (R) is not a correct explanation of the Assertion (A).
  3. C Assertion (A) is True but the Reason (R) is False.
  4. D Assertion (A) is False but the Reason (R) is True.
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Correct answer: A

18
Statement-I: On the rocky sea coasts of Scotland, the larger and competitively superior barnacle Balunus dominates the intertidal area, and excludes the smaller barnacle Chathamalus from that zone.
Statement-II: Herbivores and plants appear to be less adversely affected by competition than carnivores.
  1. A Both Statement-I and Statement-II are correct.
  2. B Both Statement-I and Statement-II are incorrect.
  3. C Statement-I is correct and Statement-II is incorrect.
  4. D Statement-I is incorrect and Statement-II is correct.
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Correct answer: C

19
Pollinators of flowers are;
  1. A keystone species.
  2. B link species.
  3. C helper species.
  4. D biotic species.
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Correct answer: A

20
Match the List-I and List-II select the correct option.
Organisms And Populations – NEET-5467
  1. A A-R; B-Q; C-P; D-S
  2. B A-R; B-Q; C-S; D-P
  3. C A-R; B-P; C-Q; D-S
  4. D A-Q; B-R; C-P; D-S
Show answer

Correct answer: A

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