How many bacteria are produced in four hours if a bacterium divides once in half an hour?

Which of the following statement$(s)$ is/are correct for bacteria?

$A$: Bacillus and Coccus types of bacteria are found in colonial forms.
$R$: In bacteria,cells formed by cell division remain surrounded by a secreted slimy substance.

The nucleotide sequence in ribosomal $RNA$ provides the best evidence for the phylogeny of Monera. Based on this information,which are the most primitive Monerans?

Which domain includes well-known pathogenic organisms?

In bacteria,which of the following statements is correct regarding their genetic material?