Which group of bacteria lacks a cell wall?
Explanation
Among the listed bacteria, Mycoplasma is unique because it does not possess a cell wall, unlike Rickettsia, Chlamydia, and Ehrlichia which have cell walls.
Among the listed bacteria, Mycoplasma is unique because it does not possess a cell wall, unlike Rickettsia, Chlamydia, and Ehrlichia which have cell walls.