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3. Which statement describes a difference between
the nitrogen and carbon cycles?
a. The carbon cycle involves only plants.
Ob. The nitrogen cycle requires a process
called nitrogen fixation that is carried out by
certain bacteria.
O c. The carbon cycle requires freezing
temperatures.
d. The nitrogen cycle occurs entirely in
the ocean.

Respuesta :

bezzyBUZZ123

Answer:

a.

Explanation:

The carbon cycle involves only plants. The nitrogen cycle requires a process called fixation, which makes the nitrogen more usable for living organisms. The carbon cycle requires that temperatures be above 27 °C (80 °F).

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aminaboyd

Answer:

a. The carbon cycle requires that temperatures be above 27 °C (80 °F).

Explanation: