Three-year-old Ben's parents are ecstatic because he is now using the potty each time he needs to defecate. What muscle has Ben learned to control?
A. The Sphincter of Oddi made of smooth muscle
B. The external anal sphincter made of striated muscle
C. The internal anal sphincter made of smooth muscle
D. The pyloric sphincter made of smooth muscle
E. The cardiac sphincter made of striated muscle
Answer: B
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a. methods of cultivating Mycobacterium in vitro. b. digestion and decontamination of speci-mens for mycobacterial studies. c. identification of clinically significant Mycobacterium. d. antimicrobial susceptibility testing of mycobacterial species.
Populations can be described in terms of their diversity and stability
What will be an ideal response?
Stamens, sepals, petals, carpels, and pinecone scales are all _____
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Bats in Cameroon, tropical West Africa, play a greater diversity of ecological roles than do bats in Ontario, Canada. Fish in the mouth of a Mexican river system play a greater diversity of ecological roles than do fish in the headwaters of the same river system. Both of these observations are supportive of which of the following hypotheses?
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