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Assertion & Reason Test: Organisms & Populations - NEET MCQ


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10 Questions MCQ Test Topic-wise MCQ Tests for NEET - Assertion & Reason Test: Organisms & Populations

Assertion & Reason Test: Organisms & Populations for NEET 2024 is part of Topic-wise MCQ Tests for NEET preparation. The Assertion & Reason Test: Organisms & Populations questions and answers have been prepared according to the NEET exam syllabus.The Assertion & Reason Test: Organisms & Populations MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Assertion & Reason Test: Organisms & Populations below.
Solutions of Assertion & Reason Test: Organisms & Populations questions in English are available as part of our Topic-wise MCQ Tests for NEET for NEET & Assertion & Reason Test: Organisms & Populations solutions in Hindi for Topic-wise MCQ Tests for NEET course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Assertion & Reason Test: Organisms & Populations | 10 questions in 20 minutes | Mock test for NEET preparation | Free important questions MCQ to study Topic-wise MCQ Tests for NEET for NEET Exam | Download free PDF with solutions
Assertion & Reason Test: Organisms & Populations - Question 1
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : The human population represents the logistic growth curve.

Reason (R) : When the resources are limited leading to competition between individuals and survival of fittest, the population tends to grow in a logistic manner.

Detailed Solution for Assertion & Reason Test: Organisms & Populations - Question 1
The human population represents the logistic growth curve as the numbers of human beings are increasing rapidly but available resources are not increasing at the same pace. Such a growth pattern is not sustainable because at one point the human population would reach a place where there would not be enough resources for everyone.
Assertion & Reason Test: Organisms & Populations - Question 2
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion : Natality rate increases the population size and population density both.
Reason : Natality increases the number of individuals in an area by births.

Detailed Solution for Assertion & Reason Test: Organisms & Populations - Question 2

Correct answer is D. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

  • Natality rate, also known as the birth rate, represents the number of births in a population over a specific period.
  • Natality indeed increases the number of individuals in a population by contributing new individuals through births.
  • When natality rate is high, it leads to an increase in the population size, as more individuals are being added through births.
  • The increase in population size, in turn, affects population density, which is the number of individuals per unit area.
  • Therefore, both the population size and population density increase when the natality rate is high.
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Assertion & Reason Test: Organisms & Populations - Question 3
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : The term interbreeding implies sexual reproduction.

Reason (R) : Interbreeding results in variation among species.

Detailed Solution for Assertion & Reason Test: Organisms & Populations - Question 3
Interbreeding implies sexual reproduction which involves the fusion of two gametes of different species which bring variation among the species.
Assertion & Reason Test: Organisms & Populations - Question 4
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : A community with more species is more stable than that with less species.

Reason(R) : More the number of species, lesser the variation in the total biomass production year after year.
Detailed Solution for Assertion & Reason Test: Organisms & Populations - Question 4

Communities with more species tend to be more stable than those with less species because they are able to resist occasional disturbance . David Tilman’s long term experiments showed the plots with more species, experience less year to year variation in total biomass.

Assertion & Reason Test: Organisms & Populations - Question 5
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Different habitats had different physical and chemical conditions.

Reason (R) : Physicochemical (abiotic) components characterize the habitat of an organism.
Detailed Solution for Assertion & Reason Test: Organisms & Populations - Question 5
Habitat is governed by the both abiotic and biotic components.
Assertion & Reason Test: Organisms & Populations - Question 6
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Ecology is concerned with four levels of biological organisation.

Reason (R) : Organisms, populations, communities and biomes are four levels of biological organisation.
Detailed Solution for Assertion & Reason Test: Organisms & Populations - Question 6
Ecology includes six levels of organization that are organism, population, community, ecosystem, biosphere and biome.
Assertion & Reason Test: Organisms & Populations - Question 7
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Small animals are rarely found in polar regions.

Reason (R) : Heat loss or heat gain is a function of surface area. Large surface area, great loss of heat.
Detailed Solution for Assertion & Reason Test: Organisms & Populations - Question 7
Small animals have a large surface area with respect to their volume, so they lose body heat fast if it is cold outside, small animals are rarely found in polar regions.
Assertion & Reason Test: Organisms & Populations - Question 8
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Many freshwater animals cannot live for long in sea water.

Reason (R) : Freshwater animals face osmotic problems in sea water.
Detailed Solution for Assertion & Reason Test: Organisms & Populations - Question 8
When freshwater animals move into sea, water continuously moves out of the animal’s body through the process of osmosis.
Assertion & Reason Test: Organisms & Populations - Question 9
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Population has certain attributes which an individual organism does not have.

Reason (R) : Population is a group of people living in a well defined area, at a particular time.
Detailed Solution for Assertion & Reason Test: Organisms & Populations - Question 9
Population is a group of people therefore it's attributes are different from an individual organism.
Assertion & Reason Test: Organisms & Populations - Question 10
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Clown fish maintains a commensalistic relation with the sea anemone.

Reason (R) : In this interaction, one species benefits and the other is neither harmed nor benefited.
Detailed Solution for Assertion & Reason Test: Organisms & Populations - Question 10
Clown fish maintain a commensalistic relation with the sea anemone. In this interaction, one species benefits and the other is neither harmed nor benefited. Sea anemone has stinging tentacles that provide protection to Clown fish from predators. The sea anemone does not appear to derive any benefit from the clownfish.
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