Answer:
A. They were part of the control group
Explanation:
In a scientific experiment, the CONTROL GROUP as opposed to the experimental group is the group that does not receive the experimental treatment. This acts as a standard for comparison.
In this question, the EXPERIMENTAL VACCINE is the experimental treatment or independent variable that was added. The five animal test subjects that was injected with this vaccine are called the EXPERIMENTAL GROUP while the other five test subjects that were rather injected with a PLACEBO are called CONTROL GROUPS.
I believe the answer is linear :)
D) cell wall have vesicles and cell membrane have plasmids...
Remember cell wall is hard n have rigid shape and it protect de internal organs... But a membrane is soft n nor a rigid shape...
If a human system fails to function properly, what is the most likely result a disturbance in homeostasis