The second structure encountered in a biopsy of the

digestive tract is the
a. mucosa.
b. submucosa.
c. longitudinal muscle layer.
d. circular muscle layer.
e. serosa.


Answer: b

Biology & Microbiology

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Fill in the blank(s) with the appropriate word(s).

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Populations of endotherms that live in colder climates tend to have shorter ears and limbs than populations of the same species in warm climates. This is called ____________ Rule. 

A. Allen's B. the K-Selected C. the r-Selected D. Edward's

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An increase in total peripheral resistance, in the absence of any change in cardiac output, would

A) reduce the stretch on the aorta. B) elevate mean arterial pressure. C) decrease pulmonary venous pressure. D) reduce mean arterial pressure. E) decrease central venous pressu

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