Q: Red blood cells don't have a nucleus. this allows them to do what? Choices: - be redder - move faster - heal faster - carry more oxygen A:
carry more oxygen

Q: The total number of protons and neutorns in an atom is called what? Choices: - atom number - volume number - formation number - mass number A:
mass number

Q: Q: Both fluorine and lithium are highly reactive elements because of their number of what? Choices: - shell electrons - positrons - covalence electrons - valence electrons A:
A: valence electrons

Question: Q: The attraction between all objects in the universe is known as ______. Choices: - variation - electricity - magnetism - gravity A:
Answer: gravity

*Question*
Q: Transport vesicles move what type of molecules from the rough endoplasmic reticulum to the golgi apparatus? Choices: - acids - lipids - hormones - proteins A:
**Answer**
proteins

Q: Q: Hypersensitivity may refer to a maladaptive response of what system toward a harmless foreign substance? Choices: - oxygen - brain - System - immune A:
A: immune