Multiple choice

Legume plants are important for the atmosphere because they

  1. help in nitrogen fixation

  2. do not help in nitrogen fixation

  3. increase the soil fertility

  4. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The rhizobia bacteria in the soil invades the root and multiplies within its cortex cells. It helps in the nitrogen fixation, thereby increasing the fertility of the soil.