When does the most rapid growth occur during pregnancy?
a. first trimester
b. second trimester
c. third trimester
d. implantation
c. third trimester
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The source of variation among microorganisms that were once identical is
A. antibiotic resistance. B. virulence factors. C. sigma factors. D. mutation.
How does stomach acid assist the innate immune system?
a. The acid signals B cells to the site of infection. b. The acid signals T cells to the site of infection. c. The acid creates an inhospitable environment for pathogens to live. d. The acid breaks down the food sources, and the pathogen starves.
The secretion of TSH by the anterior pituitary gland stimulates the thymus to secrete thymosin.
a. true b. false
While focusing on a microscope on high power, a student crushed the coverslip. The student probably
a. shut the light off b. turned up the light intensity c. rotated the eyepiece d. used the coarse adjustment