Mycobacteria species contain peptidoglycan in their cell envelope. B. For those Archaeal types that possess a cell wall, it is comprised of pseudomurien. C. Mycoplasma species of bacteria would very likely not be affected at all by the presence of penicillin or vancomycin. D. None A-C are false, all the above are true.

Option D is correct

Explanation:

A -it has a significant peptidoglycan - arbinogalactan - mycoli acid wall structure which provides external permeability.

B. They have cell walls that are made of polysaccharide pseudomurien.

C. Mycoplasma is a bacteria that lacks cell wall which makes it resistant to antibiotics like peneciline and vycomime that target cell wall synthesis.

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.