The branch of microbiology that deals with the mechanisms by which the human body protects itself from disease-causing organisms is called ________.
Fill in the blank(s) with the appropriate word(s).
immunology
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Which is a primary reason that females are at greater risk of a urinary tract infection than are males?
A. The urethra is shorter in women, therefore bacteria are closer in proximity to the bladder. B. The pH of women is lower due to a greater abundance of lactobacilli which can overcolonize the urethra and migrate to the bladder. C. Hormonal shifts in women can lead to overgrowth of genitourinary bacteria that eventually colonize the bladder. D. The urethra is longer in women, therefore more bacteria can colonize the pathway to the bladder.
All members of the phylum Chordata share
a. a notochord present sometime in their lives. b. a vertebral column. c. gills present throughout their lives. d. tails present throughout their lives. e. exoskeletons.
When does the electron become excited?
a. when the energy of the photon is transferred to it b. when the light is not absorbed c. when the energy of the photon is taken away from it d. when the light does not exist
A substance that is a solid
A. contains a large amount of oxygen. B. contains molecules that are packed tightly together and vibrate in place. C. is bonded very tightly (covalent). D. contains a large amount of hydrogen bonds.