What is found within a small intestinal villus?
a. blood and lymph vessels
b. enzymes
c. secretory glands
d. chyme
e. smooth muscle
ANSWER: a
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) Places of economic activity organized around one or more high-growth industries are known as
A) growth poles. B) north poles. C) economic poles. D) industrial poles. E) government poles.
In 20-40% of men past puberty, the mumps virus can cause
a) orchitis. b) liver damage. c) fever. d) death.
The condition known as microbial antagonism may be defined as
A) microorganisms that remain with a person throughout life. B) a relationship between two organisms where one member harms the other. C) a relationship between two organisms where only one member benefits. D) an unsuccessful microbial invasion due to the presence of preexisting microbes. E) a relationship between two organisms where both members benefit.
All vertebrates have ________.
A. a skull and a backbone B. four limbs and a backbone C. hair and a backbone D. scales and a backbone