"Plan B", the most widely used emergency contraceptive, delivers a large dose of which hormone?
a. estrogen
b. luteinizing hormone
c. oxytocin
d. progesterone
e. prolactin
ANSWER: d
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Scientists use genome-wide association studies to research which of the following?
a. viral diseases b. single-gene inherited diseases c. diseases caused by multiple genes d. diseases caused by environmental factors
Which of the following is NOT a feature of
trypanosomes? a. anaerobic respiration b. single, large mitochondrion c. cause widespread and serious infections of humans and cattle in the tropics d. life cycle involves an intermediate, bloodsucking insect host e. causative agents of Chagas disease and African sleeping sickness
The figure below shows a normal cell transduction pathway. If the receptor weren't there, which of the following is the most likely outcome?
A) Cell division will occur normally.
B) Cell division will not occur at all.
C) Cell division will be increased.
D) Cell division will be decreased.
Which is incorrect about Mycoplasma pneumoniae?
A. It has birds as a reservoir. B. It is a common cause of primary atypical pneumonia. C. Initially causes fever, malaise, sore throat, headache. D. After 2 to 3 weeks, it develops into an unproductive cough and earache. E. Is a bacterial cell without a cell wall.