$A$ : Majority of bacteria are autotrophs.
$R$ : Chemoheterotrophic nutrition is absent in bacteria.

  • A
    Assertion and Reason both are correct and Reason is the correct explanation of Assertion.
  • B
    Assertion and Reason both are correct but Reason is not the correct explanation of Assertion.
  • C
    Assertion is correct,but Reason is incorrect.
  • D
    Both Assertion and Reason are incorrect.

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The elementary cell body in $Mycoplasma$ performs the function of:

Which of the following statements is correct?

Salmonella sp. is

$A$ heterocyst constitutes a:

Assertion $A$: Some bacteria possess unique phenotypic characters.
Reason $R$: Many bacterial cells contain plasmid $DNA$ in addition to genomic $DNA$.
Which option is correct for Assertion $A$ and Reason $R$?

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