Q: Water is an oxide of what element? Choices: - nitrogen - helium - carbon - hydrogen A:
hydrogen

Q: The bone matrix consists of tough protein fibersmainly what? Choices: - tissues - hemoglobin - tendons - collagen A:
collagen

Q: Q: Illnesses caused by bacteria in food are commonly known as what? Choices: - chemical poisoning - the flu - viral poisoning - food poisoning A:
A: food poisoning

Question: Q: What type of organism, including sea stars and sand dollars, is named for their spiny skin? Choices: - mollusks - diatoms - chordates - echinoderms A:
Answer: echinoderms

*Question*
Q: Sound navigation and ranging is an acronym for what, which is used to locate underwater objects such as submarines? Choices: - sound transmission - GPS - radar - sonar A:
**Answer**
sonar

Q: Q: What theory proposes that microorganisms are the cause of many diseases? Choices: - malignant theory - evolution theory - mutated theory - germ theory A:
A: germ theory