Q: Capillaries are narrow-diameter tubes that can fit red blood cells through in single file and are the sites for the exchange of what? Choices: - proteins - fluids - components - nutrients A:
nutrients

Q: What monitors the level of carbon dioxide in the blood? Choices: - the lungs - the heart - the kidneys - the brain stem A:
the brain stem

Q: What is the name for a biologist who studies fungi? Choices: - egyptologists - musicologists - oncologists - mycologists A:
mycologists