A:
Energy flow in ecosystem is bidirectional. R:
Energy goes on increasing with each and every trophic level. In the following questions a statement of assertion (A) is followed by a statement
of reason (R). 1. If both Assertion & Reason are true and the
reason is the correct explanation of the assertion, then mark (1) 2.
If both Assertion & Reason are true but the reason is not the correct explanation
of the assertion, then mark (2) 3. If Assertion is true statement
but Reason is false, then mark (3) 4. If both Assertion and Reason
are false statements, then mark (4)
If both the assertion and the reason are true and the reason is a correct explanation of the assertion
If both the assertion and reason are true but the reason is not a correct explanation of the assertion
If the assertion is true but the reason is false
If both the assertion and reason are false
Subtopic: Energy Flow | Ecological Pyramids |
91%
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NEET 2023 - Target Batch - Aryan Raj Singh
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An ecosystem which can be easily damaged but can recover if damaging effects stop, will be having
1. Low stability and high resilience
2. High stability and low resilience
3. High stability and high resilience
4. Low stability and low resilience
Subtopic: Components & Types of Ecosystems | Ecosystem Productivity |
64%
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Consider the following statements with respect to food chain
A. Removal of 80% tigers from an area resulted in increased growth of vetetation
B. Removal of most of the carnivores resulted in increased growth of vegetation
C. The length of food chain is generally limited to 3-4 tropic levels due to energy loss
D. The length of food chains may vary from 208 trophic levels
Choose the correct answer from the options given below:
1. A, D
2. A, B
3. B, C
4. C, D
Subtopic: Energy Flow |
67%
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At each trophic level, a certain mass of living material at a particular time is known as
1. Dry weight
2. Standing crop
3. Fresh weight
4. Standing state
Subtopic: Energy Flow |
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A species when defined in terms of the total interactions of all its members with the nonliving and living part of the environment, in a specific area, is known as
1. Biological species concept
2. Ecological species concept
3. Morphological species concept
4. Interactive species concept
Subtopic: Introduction |
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Arrange the following, starting from first trophic level
A. Molluscs
B. Hydrilla
C. Snake
D. Hawk
E. Fish
Choose the correct answer from the options given below
1. A, B, C, D, E
2. B, A, C, D, E
3. B, A, E , C, D
4. B, A, E, D, C
Subtopic: Energy Flow |
74%
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Find out the correct sequence in hydrosere
A. Hydrilla
B. Oak
C. Scirpus
D. Volvox
E. Pistia
Choose the correct answer from the options given below
1. A, B, C, D, E
2. B, C, D, E, A
3. D, A, E, C, B
4. C, D, E, A, B
Subtopic: Ecological Succession (OLD NCERT) |
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Which of the following are major natural mechanisms for the breakdown of chemicals in the environment?
A. Degradation by sunlight
B. Auto-halogenation
C. Microbial degradation
D. Auto-phosphorylation
E. Auto-oxidation
Choose the correct answer from the options given below
1. A, C and D only
2. B, D and E only
3. A, C and E only
4. A, B and D only