Ques:Q: Which region is just posterior to the mouth? Choices: - the esophagus - the duodenum - the diaphragm - the pharynx A:

Ans:the pharynx
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Ques:Q: What system, which includes the skin, plays important roles in protection, sensing stimuli and thermoregulation? Choices: - digestive system - pectins system - teleporters system - integumentary system A:

Ans:integumentary system
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Ques:Q: How thick is the earth's continental crust, on average? Choices: - 60 kilometers - 15 kilometers - 25 kilometers - 35 kilometers A:

Ans:35 kilometers
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Ques:Q: A notochord has in common with what vertbrate structure? Choices: - trichord - rib cage - rip chord - spinal cord A:

Ans:
spinal cord
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