The rotifer, or wheel animal, which can be as small 50um.
I don't know if this is right
Explanation:
The pigment that makes red blood cells red, hemoglobin, is a protein that oxygen sticks to. That's how its carried throughout the body.
Eukaryotes cells have the ability to change into multi-celled organisms
Answer:
-Avoid large crowds
-Wash your hands regularly
-Strengthen your immune system
-Get an annual flu vaccine
-Clean and disinfect surfaces
