Multiple choice

Mycorrhiza promotes plant growth by

  1. absorbing inorganic ions from soil

  2. helping the plant in utilising atmospheric nitrogen

  3. protecting the plant from infection

  4. serving as a plant growth regulator

  5. -
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A Correct answer
Explanation

Mycorrhizal fungal filaments in the soil are truly extensions of root systems and are more effective in nutrient and water absorption than the roots themselves. More than 90 percent of plant species in natural areas form a symbiotic relationship with the beneficial mycorrhizal fungi.

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