Bacteria and parasitic protists can cause infections in the human digestive system. To treat such infections, the organisms causing the infections must be identified. Which cellular structures would separate a bacterial cell from a parasitic protist? A
a cell wall and no nucleus

B
ribosomes and a cell membrane

C
free-floating proteins and cytoplasm

D
a round shape and free-floating proteins

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

ice cream

explanation:

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.