The cells of the bacterium $Staphylococcus$ remain arranged in the form of:

Assertion: Bacteria have three basic shapes,i.e.,round,rod,spiral.
Reason: Cocci and Bacilli may form clusters or chains of a definite length.

Cell division in blue-green algae (Cyanobacteria) resembles which of the following?

In blue-green algae,photosynthesis occurs in .........

An organism lacking chlorophyll but able to carry on photosynthesis of organic matter has been found among which one of the following?

Which of the following is effective against mycoplasmal diseases?