Multiple choice

Nitrogen can only be used after it is fixed. Which of the following can fix nitrogen?

a. Soil microorganisms and associated plant roots b. Lightning and cosmic radiation c. Some marine animals d. Green plants

  1. a and b

  2. a, b and c

  3. a, b, c and d

  4. a, b and d

  5. b, c and d
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct asnwer as soil microorganisms and associated plant roots, lightning and cosmic radiation and some marine animals can fix nitrogen from the atmosphere.

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