The different steps in a nodule formation are given below - I. A matured nodule establishes a di...

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The different steps in a nodule formation are given below -
I. A matured nodule establishes a direct vascular connection with the host for exchange of nutrients
II. Root hair curls and the bacteria invade the root hair
III. Rhizobium bacteria contact a susceptile root hair, divide near it
IV. The infection thread is produced carring the bacteria and grows into the cortex of the root
V. The bacteria get modified into rod-shaped bacteroids and cause inner cortical layer and pericycle to divide to form nodule.
The correct sequence is -
(a) III, II, IV, I, V
(b) III, II, IV, V, I
(c) IV, V, III, II, I
(d) I, III, V, II, IV
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