Ques:Q: The once compressed universe expanded rapidly after what nicknamed event billions of years ago? Choices: - big explosion - good bang - big bust - big bang A:

Ans:big bang
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Ques:Q: What is in the inside of your mouth and nose instead of skin? Choices: - scales - gums - cuticle layer - mucous membranes A:

Ans:mucous membranes
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Ques:Q: What chemical element helps forms strong bones and teeth in humans? Choices: - iron - potassium - magnesium - calcium A:

Ans:calcium
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Ques:Q: Vertebrates have tissues which are organized into organs which in turn are organized into what? Choices: - artificial systems - information systems - maturation systems - organ systems A:

Ans:
organ systems
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