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 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.
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