Antibody-mediated responses work against _____
a. intracellular pathogens
b. extracellular pathogens
c. cancerous cells
d. both intracellular pathogens and extracellular pathogens
e. both extracellular pathogens and cancerous cells
f. intracellular pathogens, extracellular pathogens, and cancerous cells
E
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The major drainage structure within the lymphatic system is the ____
a. spleen b. tonsils c. right and left thoracic ducts d. thymus gland e. thoracic duct
A color-blind man has a son who is also color blind. The son inherited the condition from his
____________________. Fill in the blank(s) with the appropriate word(s).
Bio" refers to a gene that governs a cell's ability to synthesize biotin from inorganic precursors. What does the designation "bio+" indicate?
a. that the bacterium is biologically inactive b. that the allele is the mutant allele c. that the bacterium is biologically active d. that the allele is normal (i.e., wild type)
Which agency is responsible for regulating disinfectants?
A) Environmental Protection Agency B) National Institutes of Health C) Food and Drug Administration D) World Health Organization