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JAMB Biology 2022 Objective — Question 27

Question 27 of 40 from the Joint Admissions and Matriculation Board (JAMB) Biology 2022 Objective paper, with the correct answer and a full explanation.

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27. Rhizobium which lives in the root nodules of leguminous plants is an example of the association known as

  • A. (A) saprophytism
  • B. (B) mutualismCorrect
  • C. (C) epiphytism
  • D. (D) commensalism

Explanation

The relationship between Rhizobium and leguminous plants is an example of mutualism: the bacterium helps the plant fix nitrogen, while the plant provides food and shelter for the bacterium.

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