What is the membrane that sheath of schwann cell containing cytoplasm and nucleus that encloses myelin

Which of the following is an example of a non-falsifiable hypothesis? a. there is a teacup orbiting the milky way galaxy. b. there is no life on mars. c. the human species started in africa. d. humans cannot live without the amino acid methionine

Models are non-visual ways of coummincating how someone thinks about something in the natural world

All eukaryotic cells contain small bodies called