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Q. No.Consider the given two statements:
Assertion (A):
Heterotrophs generally have high energy conversion efficiencies when compared to those of plants.
Reason (R):
At higher trophic levels, the respiratory costs are dramatically reduced.
1.
(A) is True but (R) is False
2.
Both (A) and (R) are True and (R) correctly explains (R)
3.
Both (A) and (R) are True but (R) does not correctly explain (A)
4.
Both (A) and (R) are False
Subtopic: Energy Flow |
52%
Level 3: 35%-60%
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Rate of formation of new organic matter by consumers is called as:
1. Gross primary productivity
2. Net primary productivity
3. Secondary productivity
4. Tertiary productivity
1. Gross primary productivity
2. Net primary productivity
3. Secondary productivity
4. Tertiary productivity
Subtopic: Ecosystem Productivity |
85%
Level 1: 80%+
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Consider the two given statements:
| Assertion (A): | Secondary succession is faster than the primary succession. |
| Reason (R): | Soil is already there at the time of secondary succession. |
| 1. | Both (A) and (R) are True and (R) correctly explains the (A) |
| 2. | (A) is True but (R) is False |
| 3. | (A) is False but (R) is True |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A) |
89%
Level 1: 80%+
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In the equation
GPP is Gross Primary Productivity. NPP is net Primary Productivity. R here is ___________
1. Reproductive allocation
2. Photosynthetically active radiation
3. Respiratory quotient
4. Respiratory loss
GPP is Gross Primary Productivity. NPP is net Primary Productivity. R here is ___________
1. Reproductive allocation
2. Photosynthetically active radiation
3. Respiratory quotient
4. Respiratory loss
Subtopic: Ecosystem Productivity |
89%
Level 1: 80%+
NEET - 2023
Hints
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 |
84%
Level 1: 80%+
NEET - 2023
Hints
Match List - I with List - II
Choose the correct answer from the options given below:
| List - I | List - II | ||
| (A) | Hydrarch succession | (I) | Gradual change in the species composition |
| (B) | Xerarch succession | (II) | Faster and climax reached quickly |
| (C) | Ecological succession | (III) | Lichens to mesic conditions |
| (D) | Secondary succession | (IV) | Phytoplankton to mesic conditions |
| Options: | (A) | (B) | (C) | (D) |
| 1. | IV | II | III | I |
| 2. | III | I | IV | II |
| 3. | I | IV | II | III |
| 4. | IV | III | I | II |
71%
Level 2: 60%+
NEET - 2023
Hints
The amount of nutrients such as carbon, nitrogen, potassium and calcium present in the soil at any given time is referred to as:
| 1. | Standing state | 2. | Standing crop |
| 3. | Humus | 4. | Detritus |
64%
Level 2: 60%+
NEET - 2023
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Given below are two statements:
| Assertion (A): | Lichens are the first organisms to colonise bare rocks hence are ecologically important |
| Reason (R): | Lichens are symbiotic association between two heterotrophs |
| 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. |
66%
Level 2: 60%+
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Given below are two statements:
| Assertion (A): | No energy that is trapped into an organism remains in it for ever. |
| Reason (R): | The energy trapped by producers is either passed on to a consumer or the organism dies. |
| 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. |
Subtopic: Energy Flow |
83%
Level 1: 80%+
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Given below are two statements:
| Assertion (A): | Pyramid of energy is always upright, can never be inverted. |
| Reason (R): | When energy flows from a particular trophic level to the next trophic level, some energy is always lost as heat at each step. |
| 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. |
Subtopic: Ecological Pyramids |
91%
Level 1: 80%+
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