Which of the following statements is correct regarding nitrogen fixation in legumes?

  • A
    Legumes fix nitrogen through bacteria in their leaves.
  • B
    Legumes fix nitrogen through bacteria in their roots.
  • C
    Legumes fix nitrogen independent of bacteria.
  • D
    Legumes do not fix nitrogen.

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Arrange the stages of root nodule formation in the correct sequence:
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$II-$ Bacteria are carried to the cortex of the root.
$III-$ Bacteria attach to the root hair.
$IV-$ Bacteria are released from the thread into the cells.
$V-$ Differentiation into nitrogen-fixing cells occurs.

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