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Q. No.Secondary productivity is the rate of formation of new organic matter by:
1. Parasite
2. Consumer
3. Decomposer
4. Producer
Subtopic: Ecosystem Productivity |
87%
From NCERT
AIPMT - 2013
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| Assertion (A): | Decomposition process is slower if detritus is rich in lignin and cutin. |
| Reason (R): | Decomposition is largely an oxygen requiring process. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true and (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Decomposition |
66%
From NCERT
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A complex of interconnected food chains in an ecosystem is called a(an)
1. ecosystem
2. pyramid of numbers
3. pyramid of biomass
4. food web
1. ecosystem
2. pyramid of numbers
3. pyramid of biomass
4. food web
Subtopic: Energy Flow |
96%
From NCERT
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Which of the following shows the correct flow of energy through ecosystems?
1. sun → primary consumer → secondary consumer → producer
2. sun → producer → secondary consumer → primary consumer
3. sun → secondary consumer → primary consumer → producer
4. sun → producer → primary consumer → secondary consumer
1. sun → primary consumer → secondary consumer → producer
2. sun → producer → secondary consumer → primary consumer
3. sun → secondary consumer → primary consumer → producer
4. sun → producer → primary consumer → secondary consumer
Subtopic: Energy Flow |
98%
From NCERT
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A community and its abiotic environment best define a(an)
1. biogeochemical cycle
2. biosphere
3. ecosystem
4. food web
1. biogeochemical cycle
2. biosphere
3. ecosystem
4. food web
Subtopic: Introduction |
100%
From NCERT
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Which ecosystem has the maximum biomass?
1. Grassland ecosystem
2. Pond ecosystem
3. Lake ecosystem
4. Forest ecosystem
Subtopic: Ecosystem Productivity |
70%
NEET - 2017
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Consider the pyramid of energy of an ecosystem given below :
If \(\text T_4\) is equivalent to \(1000~\text J,\) what is the value of T1?
If \(\text T_4\) is equivalent to \(1000~\text J,\) what is the value of T1?
| 1. | \(\dfrac{ 1000 }{10}~\text J\) | 2. | \(\dfrac{ 1000}{10} \times 4~\text J \) |
| 3. | \(10,000~\text J\) | 4. | \(10,00,000~\text J \) |
Subtopic: Energy Flow |
89%
From NCERT
NEET - 2024
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Which of the following processes increase(s) the amount of atmospheric carbon in the carbon cycle?
1. photosynthesis
2. cellular respiration
3. combustion
4. b and c
1. photosynthesis
2. cellular respiration
3. combustion
4. b and c
95%
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Identify the correct statements:
Choose the correct answer from the options given below:
| A: | Detrivores perform fragmentation. |
| B: | The humus is further degraded by some microbes during mineralization. |
| C: | Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching. |
| D: | The detritus food chain begins with living organisms. |
| E: | Earthworms break down detritus into smaller particles by a process called catabolism. |
Choose the correct answer from the options given below:
| 1. | D, E, A only | 2. | A, B, C only |
| 3. | B, C, D only | 4. | C, D, E only |
Subtopic: Decomposition |
83%
From NCERT
NEET - 2023
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In the carbon cycle, carbon is found in
1. limestone rock
2. oil, coal, and natural gas
3. living organisms
4. all of the preceding
1. limestone rock
2. oil, coal, and natural gas
3. living organisms
4. all of the preceding
68%
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