Q: All animals that derive energy from food are classified as what? Choices: - lifeforms - paleotrophs - heliotrophs - heterotrophs A:
heterotrophs

Q: The ozone layer protects the earth from what? Choices: - pollution - light waves - radio waves - uv radiation A:
uv radiation

Q: Q: In a controlled scientific study, what do you call a factor that can take on different values? Choices: - output - input - vector - variable A:
A: variable

Question: Q: Sedimentary rocks form in what kind of layers? Choices: - stacked - magnetic - vertical - horizontal A:
Answer: horizontal

*Question*
Q: All lipids have two distinct domains, a hydrophobic and a what? Choices: - hydroceptive - covalent - hydroaversive - hydrophilic A:
**Answer**
hydrophilic

*Question*
Q: Some bacteria can contaminate food and cause what illness? Choices: - natural poisoning - bacterial poisoning - bacterial spoilage - food poisoning A:
**Answer**
food poisoning