Question

How do plants get the nitrogen they need?

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A. Directly from the soil
B. From the air
C. From bacteria living in their roots
D. Through photosynthesis

Answer 1

Plants primarily obtain the nitrogen they need from the soil through a symbiotic relationship with nitrogen-fixing bacteria living in their roots. These bacteria convert atmospheric nitrogen into a form that plants can absorb and utilize for their growth and development.

So, the correct answer is C - from bacteria living in their roots.