Which of the following would be the most unexpected feature in a swiftly moving, actively searching predator?
a. Radial symmetry
b. Brain
c. Eyes
d. Skeleton
e. Well-developed, segmented muscles
Ans: a. Radial symmetry
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Which of the following is NOT characteristic of a coliform?
A) facultatively aerobic B) gram-negative C) rod shaped D) resistant to chlorination
When an action potential is initiated, ________ flow ________ the cytoplasm of the axon
a. negative potassium ions / into b. positive sodium ions / into c. negative sodium ions / out of d. positive sodium ions / out of
Which of the following best describes the period during which the developing offspring is considered a fetus?
A) the first trimester only B) the third trimester only C) from fertilization to three weeks D) from nine weeks until birth E) from fertilization to eight weeks
Which of the following statements regarding tuberculosis is FALSE?
A) Nearly 1/3 of the world's population is infected with tuberculosis. B) Nearly 1/3 of the world's population shows symptoms of tuberculosis. C) It is responsible for nearly 2 million deaths per year. D) At least 1/3 of those who are TB-positive are also HIV-positive. E) Treatment requires at least six months of antibiotic therapy.