Question

What would happen if nitrogen-fixing bacteria were absent in the soil?

Options

• Plants would grow faster.

• Nitrogen availability in the soil would decrease, affecting plant growth.

• Soil fertility would remain unaffected.

• The oxygen cycle would be disrupted.

Answer 1

Nitrogen availability in the soil would decrease, affecting plant growth.

Explanation:

Nitrogen-fixing bacteria convert atmospheric nitrogen into forms that plants can use, such as nitrate. Without them, nitrogen availability in soil would decrease, lowering soil fertility and limiting plant growth.