Ques:Q: The expulsion stage begins when the fetal head enters what? Choices: - head is outside vagina - you can see the umbilical cord - uterus - birth canal A:

Ans:birth canal
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Ques:Q: What kind of tests may detect substances associated with particular disorders? Choices: - hormonal - electrical - genetic - biochemical A:

Ans:biochemical
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Ques:Q: An alloy is a mixture of metals that has bulk metallic properties different from those of its what? Choices: - system elements - nuclear elements - mineral elements - constituent elements A:

Ans:constituent elements
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Ques:Q: What physical process occurs when large chunks of food are broken down into smaller pieces? Choices: - chemical digestion - swallowing - peristalsis - mechanical digestion A:

Ans:
mechanical digestion
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