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Essentiale: Ecosystem
Iris: Ecosystem
Invictus: Ecosystem
Ecosystem - Mini Q Bank
Ecosystem- Essentiale - (New NCERT)
Ecosystem - Iris - (New NCERT)
Q. No.

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): There is no limitation on the number of trophic levels in a detritus food chain.
Reason (R): The transfer of energy between successive trophic levels in a detritus food chain does not follow the 10% rule.

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:  Energy Flow |
 50%
From NCERT

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Assertion: The Amazon basin exhibits especially high productivity from roughly August through October - the period of the area's dry season.
Reason: Even in the tropics, there are variations in productivity over the course of the year.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason 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:  Ecosystem Productivity |

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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):  Strongly vertically stratified habitats are very stable ecosystems.
Reason (R):  Through the formation of different layers a given habitat is better utilized.
 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:  Components & Types of Ecosystems |
 70%

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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):  Carnivores generally have higher assimilation efficiencies than herbivores.
Reason (R):  Carnivores generally consume more food than herbivores.

 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:  Energy Flow |

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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 plants that are early seral species also tend to be wind-pollinated rather than insect-pollinated.
Reason (R):  They are often photosynthetic plants.

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:  Ecological Succession (OLD NCERT) |
 62%

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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):  Secondary succession is usually faster than primary succession. 
Reason (R):  Secondary succession is a process started by an event that reduces an already established ecosystem.

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:  Ecological Succession (OLD NCERT) |

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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):  Lichens are commonly the pioneer species during primary succession on rocks.
Reason (R):  Lichens are able to secrete acids to dissolve rocks.
 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:  Ecological Succession (OLD NCERT) |
 85%
From NCERT

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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):  Low temperature and anaerobiosis inhibit decomposition resulting in build-up of organic chemicals. 
Reason (R):  Most decomposers are anaerobic psychrophiles.

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:  Decomposition |
 55%

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Sometimes the term "detritivore" is used interchangeably with:

1.decomposers2.primary consumers
3.secondary consumers4.autotrophs

Subtopic:  Decomposition |
 90%
From NCERT

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The minimum requirement for an ecosystem to recycle nutrients present in it would be:

1.  producers
2.  producers and decomposers
3.  producers, primary consumers, and decomposers
4.  producers, primary consumers, secondary consumers, and decomposers
Subtopic:  Decomposition |
 52%

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Select Question Set:
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Essentiale: Ecosystem
Iris: Ecosystem
Invictus: Ecosystem
Ecosystem - Mini Q Bank
Ecosystem- Essentiale - (New NCERT)
Ecosystem - Iris - (New NCERT)
Q. No.

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