Q: Multiple sclerosis, huntington's disease, and parkinson's disease all affect what body system? Choices: - reproductive system - circulatory system - lymph system - nervous system A:
nervous system

Q: When electrons move from one atom to another, they become what? Choices: - particles - neons - atoms - ions A:
ions

Q: Q: What term describes scientists who debate the origin of the earliest plants? Choices: - specialists - archaebotanists - protobotanists - paleobotanists A:
A: paleobotanists

Question: Q: What attracts the earth to the sun? Choices: - weight - light - the moon - gravity A:
Answer: gravity

*Question*
Q: What are the narrowest blood vessels, where oxygen is transferred into body cells? Choices: - arteries - muscles - viens - capillaries A:
**Answer**
capillaries

Q: What waves require a material medium such as water, air, or rope? Choices: - light - potential - electromagnetic - mechanical A:
mechanical