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High School Biology: The Principles of Ecology - Recycling Matter (Fill in the blank)
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High School Biology: The Principles of Ecology - Recycling Matter (Fill in the blank)
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8 Questions

1. ____________ is an important part of living things; it is found in proteins, nucleic acids, and chlorophyll.

2. The chemical elements and water that are needed by organisms continuously ____________ in ecosystems.

3. Photosynthesis removes ____________ from the atmosphere and uses it to make organic compounds.

4. Cellular respiration releases ____________ into the atmosphere as carbon dioxide.

5. Carbon is stored for varying lengths of time as fossil ____________ deposits.

6. The deep ocean is a reservoir that may hold ____________ for thousands of years.

7. ____________ cannot use nitrogen gas from the air to make organic compounds.

8. Nitrogen-fixing ____________ live in soil and roots of legumes, such as peas.

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