Multiple choice

The pigment leghaemoglobin is formed by

  1. the roots of legumes

  2. bacteria

  3. the joint activity of bacteria and the host

  4. soil
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Effective nodules are formed by effective strains of rhizobium. They are well-developed and pink-coloured due to the presence of a pigment called leghaemoglobin. 

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