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JAMB Biology 2010 Question 29

Question 29

Ecological Associations

Mycorrhizae promote plant growth by

  1. A.protecting it from infection.
  2. B.helping it to utilize atmospheric nitrogen.
  3. C.serving as a growth regulator.
  4. D.absorbing inorganic ions from the soil.
Show the answer and explanation

Answer: D (absorbing inorganic ions from the soil.)

Explanation

Mycorrhizae are fungi living with plant roots. Their hyphae spread through the soil and absorb mineral ions for the plant, getting sugars in return.