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Q. No.Which one of the following will accelerate phosphorus cycle?
1. Rainfall and storms
2. Burning of fossil fuels
3. Volcanic activity
4. Weathering of rocks
1. Rainfall and storms
2. Burning of fossil fuels
3. Volcanic activity
4. Weathering of rocks
79%
Level 2: 60%+
NEET - 2022
Hints
Match List I with List II
Choose the correct answer from the options given below:
1. A-IV, B-I, C-II, D-III
2. A-IV, B-II, C-I, D-III
3. A-III, B-IV, C-I, D-II
4. A-II, B-I, C-IV, D-III
| List I | List II |
| A. Lichens | I. Pioneer species |
| B. Invade bare area | II. Hydrosere |
| C. Reed swamp stage | III. Final stable community |
| D. Climax | IV. Lithosere |
1. A-IV, B-I, C-II, D-III
2. A-IV, B-II, C-I, D-III
3. A-III, B-IV, C-I, D-II
4. A-II, B-I, C-IV, D-III
76%
Level 2: 60%+
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The pioneer species in a hydrarch succession are :
1. Free-floating angiosperms
2. Submerged rooted plants
3. Phytoplanktons
4. Filamentous algae
1. Free-floating angiosperms
2. Submerged rooted plants
3. Phytoplanktons
4. Filamentous algae
80%
Level 1: 80%+
NEET - 2022
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The species that come to appear in bare area are called:
1. Pioneer species
2. Invasive species
3. Competitive species
4. Species of seral community
1. Pioneer species
2. Invasive species
3. Competitive species
4. Species of seral community
85%
Level 1: 80%+
NEET - 2022
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All successions irrespective of the habitat proceed to which type of climax community ?
1. Xeric
2. Mesic
3. Hydrophytic
4. Edaphic
1. Xeric
2. Mesic
3. Hydrophytic
4. Edaphic
79%
Level 2: 60%+
NEET - 2022
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Match the List-I with List-II
Choose the correct answer from the options given below:
| List-I | List-II | ||
| (a) | Carbon dissolved in oceans | (i) | 55 billion tons |
| (b) | Annual fixation of carbon through photosynthesis | (ii) | 71% |
| (c) | PAR captured by plants | (iii) | \(4 \times 10^3 \)kg |
| (d) | Productivity of oceans | (iv) | 2 to 10% |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iv) | (iii) | (i) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (ii) | (iii) | (iv) | (i) |
| 4. | (iii) | (ii) | (i) | (iv) |
Subtopic: Ecosystem Productivity |
86%
Level 1: 80%+
NEET - 2022
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Assertion(A): Succession is a process that starts in an area where no living organisms are there.
Reason(R): Succession and evolution are parallel processes.
Choices for Assertions and reasons:
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. (A) is false, but (R) is true.
Reason(R): Succession and evolution are parallel processes.
Choices for Assertions and reasons:
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. (A) is false, but (R) is true.
65%
Level 2: 60%+
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Assertion(A): Both hydrarch and xerarch successions lead to medium water conditions (mesic) – neither too dry (xeric) nor too wet (hydric).
Reason(R): Xerarch succession takes place in dry areas and the series progress from xeric to hydric conditions.
Choices for Assertions and reasons:
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. (A) is false, but (R) is true.
Reason(R): Xerarch succession takes place in dry areas and the series progress from xeric to hydric conditions.
Choices for Assertions and reasons:
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. (A) is false, but (R) is true.
64%
Level 2: 60%+
Hints
Assertion(A): In secondary succession, the rate of succession is much faster and the climax is also reached more quickly.
Reason(R): Soil is already there in the ecosystems undergoing secondary succession.
Choices for Assertions and reasons:
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. (A) is false, but (R) is true.
Reason(R): Soil is already there in the ecosystems undergoing secondary succession.
Choices for Assertions and reasons:
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. (A) is false, but (R) is true.
83%
Level 1: 80%+
Hints
Assertion(A): 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 earth.
Reason(R): Succession and evolution would have been parallel processes at that time.
Choices for Assertions and reasons:
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. (A) is false, but (R) is true.
Reason(R): Succession and evolution would have been parallel processes at that time.
Choices for Assertions and reasons:
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. (A) is false, but (R) is true.
71%
Level 2: 60%+
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