Why does nutrients are never lost from the ecosystem?

1. Because they get transferred among various trophic levels.

2. Because they get recycled

3. Because they never get exhausted

4. Because they are required in very low quantity.

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 72%
From NCERT
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What do we call to the the movement of nutrient elements through the various components of
an ecosystem ?

1. Recycling

2. nutrient cycling

3. Biogeochemical cycle

4. Both 2 and 3.

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 84%
From NCERT
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Where do we find reservoir for gaseous type nutrient cycling?

1. Land

2. Sea

3. Earth’s crust

4. Atmosphere

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 80%
From NCERT
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Where do we find reservoir for sedimentary type nutrient cycling?

1. Land

2. Sea

3. Earth’s crust

4. Atmosphere

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 87%
From NCERT
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The rate of release of nutrients into the atmosphere is regulated by –

1. pH and moisture

2. Temperature

3. Soil

4. All of the above.

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 96%
From NCERT
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What per cent of the dry weight of organisms constitutes carbon?

1. 17%

2. 28%

3. 49%

4. 67%

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 80%
From NCERT
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Which is the second abundant matter in the body of an organism?

1. Phosphorous

2. Hydrogen

3. Carbon

4. Calcium

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 71%
From NCERT
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How much of the total quantity of global carbon is dissolved in the oceans?

1. 50%

2. 62%

3. 71%

4. 84%

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 91%
From NCERT
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Which of the following reservoir regulates the amount of carbon dioxide in the atmosphere?

1. Ocean

2. Earth’s crust

3. Land

4. Fossil

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 81%
From NCERT
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Approximately how much of carbon is fixed in the biosphere through photosynthesis annually.

1. 4 × 1013 kg

2. 5.4 x 1015 kg

3. 6.4 x 1011 kg

4. 13 x 104 kg

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 88%
From NCERT
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