I believe the last option is the correct one for the illustration of the single celled organism provides and the environment that it is found living in.
do all bacterial cells have the same structures? no
Cell membrane is like doors and windows!!
if you know how; comment !
(D) It uses enzymes to liquefy food and kill bacteria to be further digested in the intestines.
Mutations are simply a change in genes. So mutations usually result in variation of an organism that can be good or bad. Some mutations can result in physical and mental disorders like Stockholm disease or down syndrome, Where else some mutations can cause immune to diseases that are harmful.
