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) |
 90%
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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Which of the following contribute to the atmospheric CO2?
1. Producers
2. Herbivores
3. Saprotrophs
4. All of the above

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 83%
From NCERT
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