The extraembryonic membrane that secretes fluid around the developing embryo is the ____
a. allantois
b. amnion
c. chorion
d. yolk sac
e. both the allantois and the yolk sac
ANSWER: b
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What would be a consequence of a missing or damaged epiglottis?
a. an inability to swallow food b. digestive acid escaping into the esophagus c. aspiration of food into the lungs d. incomplete neutralization of chyme
You encounter a bear while hiking, which of the following predominates and causes an increase in
your heart rate and breathing to help you run away?
a. the central nervous system. b. the sympathetic nervous system c. the parasympathetic nervous system d. somatic nervous system e. cranial nerves
Plasmids that have genes for pili and can transfer copies of themselves to other bacteria during conjugation are called ________ plasmids.
Fill in the blank(s) with the appropriate word(s).
Match the terms with the labeled structures on the diagram. 
myelin sheath
Fill in the blank(s) with the appropriate word(s).