Who proposed the concept of chemotherapy, especially antimicrobials?
A. Gerhard Domagk
B. Alexander Fleming
C. Paul Ehrlich
D. Selman Waksman
E. Joseph Lister
Answer: C
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Pneumonia may be caused by all of the following EXCEPT
a. bacteria. b. viruses. c. fungi. d. influenza. e. anemia.
The ____________________ are blood pressure receptors located in the carotid arteries. Fill in the blank(s) with the appropriate word(s)
In most developing countries, ________
A) birth rates equal death rates, so the population is fairly stable B) birth rates are lower than death rates, so the population is declining C) birth rates are lower than death rates, so the population is growing rapidly D) birth rates are much higher than death rates, so the population is growing rapidly
A woman is having trouble becoming pregnant. Examination of her partner's sperm indicates that dynein feet are missing from the flagella in his sperm cells. A physician explains that this could interfere with fertility by
A) preventing the sperm from attaching to the egg cell. B) preventing the sperm from swimming to the egg cell. C) preventing the sperm from producing enough energy to power swimming. D) interfering with the attachment of the flagella to the sperm.