Q: Compounds that contain mainly the elements carbon and hydrogen are called what kind of compounds? Choices: - microscopic compounds - reactive compounds - natural compounds - organic compounds A:
organic compounds

Q: The way in which the sun produces light is called what? Choices: - tumescence - rays - photosynthesis - incandescence A:
incandescence

Q: A _______ of biology is a fundamental concept that is just as true for a bee or a sunflower as it is for us. Choices: - hypothesis - theory - notion - principle A:
principle