What is the shape of $Vibrio$ $cholerae$?

$S$ - Statement: Bacteria are divided into two groups based on the staining procedure developed by Gram.
$R$ - Reason: Bacteria that take up the Gram stain are called Gram-negative.

Organisms known as methanogens are found in abundance in ............ .

Organisms called methanogens are most abundant in a

Which of the following is a characteristic of thermoacidophiles?

Organisms of which of the following kingdom do not have a nuclear membrane?