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  • 1(current)
Q. No.
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Ecologically similar species can coexist in a community if one or more significant differences in their niches arise through time.
Reason (R): Two species cannot coexist permanently in a community if their niches are identical.
In the light of the above statements, choose the most appropriate answer from the options given below :
1.  Both (A) and (R) are true and (R) is the correct explanation of (A).
2.  Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.  (A) is true but (R) is false.
4.  Both (A) and (R) are false.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Introduction to Ecology |

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Ecology at the organismic level is essentially:
1. Physiological ecology
2. Biochemical ecology
3. Anatomical ecology
4. Pathological ecology

Subtopic:  Introduction to Ecology | Introduction to the Chapter |
 79%
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‘Realized niche’ of an organism can be best described as:

1.  the area a species can occupy in the face of exploitive competition
2.  the habitat of a species within a community resulting from clumping
3.  the habitat that exists in nature as opposed to the ideal
4.  the life pattern that the organism actually assumes

Subtopic:  Introduction to Ecology |

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): The human population is no longer growing exponentially but is still increasing rapidly.
Reason (R): Most countries of the world have undergone a demographic transition.
In the light of the above statements, choose the most appropriate answer from the options given below :
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Introduction to Ecology |

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A community of living organisms in conjunction with the nonliving components of their environment, interacting as a system is termed:

1.  ecosystem 2.  species
3.  biome 4.  population
Subtopic:  Introduction to Ecology |
 74%

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Autecology is the: 

1.  Relation of heterogeneous populations to their environment
2.  Relation of an individual to its environment
3.  Relation of a community to its environment
4.  Relation of a biome to its environment
Subtopic:  Introduction to Ecology |
 64%
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Biosphere is:

1.  A component in the ecosystem
2.  Composed of the plants present in the soil
3.  Life in the outer space
4.  Composed of all living organisms present on earth which interact with the physical environment
Subtopic:  Introduction to Ecology | Introduction to the Chapter |
 90%
From NCERT

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Identify the biome that is not correctly matched with its mean annual temperature and mean annual precipitation:

 

Biome

Mean annual temperature [0C]

Mean annual precipitation [cm]

1.

 Desert

0 – 25

 25 – 100

2.

Temperate Forest

10 – 22

50 – 220

3.

Tropical forest

20 – 25

150 – 425

4.

Coniferous forest

0 – 15

50 – 250
Subtopic:  Introduction to Ecology |
 64%
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