Answer:
most likely d, she's a chemist so she works with chemicals and substances akin to them
Answer:
A group of bacteria that accumulate in layers and secrete an protective extracellular material.
Explanation:
The biofilm is a natural way how the bacteria get together to survive in an ecosystem or in another living thing. They build little by little this kind of building with different layers of bacteria that secrets a polymer, this protection polymer could be useful to protect the colony or to be attach to another cell or to a tissue. In medicine and in veterinarian studies is interesting because can be useful to create a film to protect some injuries.
The immune system is the bodies defense against invaders and is located in all body tissues with concentration in the mucosal surfaces and skin.
