Question

7) How do nitrogen-fixing bacteria help cycle

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nitrogen through ecosystems?
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A. They change nitrogen into forms usable by
plants
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1950
B. They convert water and carbon dioxide into
sugar
C. They release the chemical energy in nitrogen for respiration
D. They convert sunlight into chemical energy stored in nitrogen
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Answer 1

A. They change nitrogen into forms usable by plants.

Step-by-step explanation:

They change nitrogen into nitrous oxide and ammonia, a form usable by plants.

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