Q. No.Sometimes the term "detritivore" is used interchangeably with:
1. decomposers 2. primary consumers 3. secondary consumers 4. autotrophs
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The minimum requirement for an ecosystem to recycle nutrients present in it would be:
| 1. | producers |
| 2. | producers and decomposers |
| 3. | producers, primary consumers, and decomposers |
| 4. | producers, primary consumers, secondary consumers, and decomposers |
Net primary productivity is the gross primary productivity minus:
| 1. | that which is consumed by herbivores |
| 2. | that which is consumed by the producer in metabolism |
| 3. | secondary productivity |
| 4. | loss due to mortality |
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Most organic material is converted to carbon dioxide, which can then be utilized in primary production by:
1. autotrophs
2. secondary consumers
3. herbivores
4. carnivores
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The best way to describe an ecosystem would be that they are:
| 1. | processors of energy and transformers of matter. |
| 2. | processors of matter and transformers of energy. |
| 3. | processors of matter and energy. |
| 4. | transformers of matter but not of energy. |
The amount of carbon dioxide in the atmosphere is:
1. increasing
2. decreasing
3. holding steady
4. fluctuating wildly
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The ecosystem that can survive in the absence of the Sun would be:
| 1. | tropical rainforest | 2. | tundra |
| 3. | benthic ocean | 4. | desert |
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An important feature of the phosphorus cycle is that its reservoir is in:
1. aquifers
2. soil and rocks
3. the atmosphere
4. the sun
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Most organic carbon on Earth is found in:
1. Atmosphere
2. Oceans
3. Biomass
4. Sedimentary rocks
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The generation of biomass of heterotrophic (consumer) organisms in a system is termed:
| 1. | biogeochemical cycles | 2. | net primary productivity |
| 3. | gross primary productivity | 4. | secondary productivity |
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