Specific to tears, salvia, and perspiration is an enzyme called __________.
Fill in the blank(s) with the appropriate word(s).
Answer: lysozyme
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A key part of the humoral immune response is _____
A) the cytotoxic T-cell attack of infected host cells B) the production of antibodies by plasma cells C) perforation of infected host cells by perforin D) phagocytosis of pathogens E) the initiation of programmed cell death in infected host cells
Gingko trees are known to lose their leaves at a certain time each year throughout the United States. Based on this information, Gingko trees in China must behave the same way. These statements are an example of:
A. inductive reasoning B. deductive reasoning C. a theory D. an experiment
Photosynthesis and respiration were the main causes of fluctuations in atmospheric CO2 levels over the last 500 million years
A. true B. false
Life ________ refers to the average number of years that an individual is expected to live from the time of his or her birth
Fill in the blank(s) with correct word