| 1. 1 pts. |
Which concept is best illustrated by this diagram?
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| A. | The exchange of CO2 and O2 in an | ||
| B. | The effect of limiting factors in a biome | ||
| C. | Cycling of nutrients in a community | ||
| D. | Environmental pressures on a | ||
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| 2. 1 pts. |
Which of these experimental designs would best test this hypothesis?
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| A. |
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| B. |
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| C. |
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| D. |
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| 3. 1 pts. |
Organisms that absorb nutrients from dead plants and animals are called | |
| A. | carnivores | |
| B. | decomposers | |
| C. | herbivores | |
| D. | producers | |
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| 4. 1 pts. |
One of the roles of decomposers in an ecosystem is to | |
| A. | convert protein and waste into ammonia and nitrates | |
| B. | produce animal and plant protein from nitrates | |
| C. | convert nitrogen from the air into ammonia and nitrates | |
| D. | release nitrogen into the air from nitrates | |
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