Methanogens are most abundant in a

  • A
    Sulphur rock
  • B
    Cattle yard
  • C
    Polluted stream
  • D
    Hot spring

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Which of the following statements is correct?

In which of the following organisms is the cell wall absent in their cells?

Heterocysts present in $Anabaena$ are specialised for:

The name cyanobacteria refers to

Plasmids occur in

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