Most parasitic bacteria are ........

Which disease is caused by mycoplasma?

Bacteria are included in which of the following kingdoms?

Pigments phycocyanin and phycoerythrin are found in

In the digestive tract of several ruminant animals like cows and buffaloes,which bacteria are present?

Assertion $A$: Bacillus and Coccus types of bacteria are found in colonial forms.
Reason $R$: In bacteria,cells formed by cell division remain surrounded by a secreted mucilaginous substance.
Which option is correct for Assertion $A$ and Reason $R$?