- 1(current)
Q. No.Consider the following two statements:
| l. | The annual net primary productivity of the whole biosphere is approximately 170 billion tons (dry weight) of organic matter. |
| ll. | Majority of this is contributed by the oceans as they occupy larger area of earth. |
1. Both l and ll are correct and ll explains l
2. Both l and ll are correct but ll does not explain l
3. l is correct but ll is incorrect
4. l is incorrect but ll is correct
Subtopic: Ecosystem Productivity |
74%
Level 2: 60%+
Hints
Links
Match each item in Column-I with one in Column-II and select the correct match from the codes given:
Codes:
| Column-I | Column-II | ||
| A. | Standing crop | P. | Mass of living material at each trophic level at a particular time |
| B. | Standing state | Q. | The amount of nutrients present in the soil at any given time |
| C. | Net primary productivity | R. | The rate of formation of new organic matter by consumers |
| D. | Secondary productivity | S. | Available biomass for the consumption to heterotrophs |
| A | B | C | D | |
| 1. | S | P | Q | R |
| 2. | P | Q | R | S |
| 3. | P | Q | S | R |
| 4. | R | P | Q | S |
Subtopic: Ecosystem Productivity | Energy Flow |
80%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
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
Hints
Assertion(A): Primary productivity depends on a variety of environmental factors.
Reason(R): Primary productivity varies in different types of ecosystems.
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): Primary productivity varies in different types of ecosystems.
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.
Subtopic: Ecosystem Productivity |
57%
Level 3: 35%-60%
Hints
- 1(current)
Q. No.
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