Ques: Q: What are the two major atmospheric gases? Choices: - carbon and helium - nitrogen and hydrogen - hydrogen and oxygen - nitrogen and oxygen A:
Ans: nitrogen and oxygen

Ques: Q: Spindle fibers form between the centrioles during prophase i of what process? Choices: - mitosis - hydrolysis - photosynthesis - meiosis A:
Ans: meiosis

Ques: Q: A low level of radiation occurs naturally in the environment and is called what? Choices: - Gamma radiation - Beta radiation - Alpha radiation - background radiation A:
Ans: background radiation

Ques: Q: What is the temperature at which condensation of water vapor occurs called? Choices: - the tipping point - the boiling point - the cooling point - the dew point A:
Ans:
the dew point