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Q. No.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
Subtopic: Ecosystem Productivity |
87%
From NCERT
NEET - 2023
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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 mineranlization. |
| 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 |
82%
From NCERT
NEET - 2023
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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 |
Subtopic: Ecological Succession (OLD NCERT) |
74%
From NCERT
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. |
Subtopic: Ecological Succession (OLD NCERT) |
64%
From NCERT
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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 |
81%
From NCERT
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Given below are two statements:
| Assertion (A): | Animals are called consumers or heterotrophs. |
| Reason (R): | All animals depend on plants directly or indirectly for their food needs. |
| 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 |
87%
From NCERT
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Given below are two statements:
| Assertion (A): | The base of a pyramid is broad and it narrows down at the apex |
| Reason (R): | Shape of pyramid may vary with the food or energy relationship between organisms at different trophic level. |
| 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 |
From NCERT
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Given below are two statements:
| Assertion (A): | The pyramid of biomass in sea is generally inverted. |
| Reason (R): | The biomass of fishes far exceeds than that of phytoplankton |
| 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 |
80%
From NCERT
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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 |
90%
From NCERT
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Given below are two statements:
| Assertion (A): | Succession and evolution would have been parallel process. |
| Reason (R): | The present day communities in the world have come to be because of succession that has occurred over millions of years since life started on the earth. |
| 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 Succession (OLD NCERT) |
74%
From NCERT
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