All of these answers are true of inflammation except __________.
A) granulocytes that have died are commonly engulfed by macrophages
B) vasodilation causes redness in affected tissues
C) histamine released by damaged host cells can result in vasodilation
D) inflammation can be triggered by microbial infection, burns, exposure to chemicals, or trauma
E) many neutrophils can be found at the site of chronic inflammation
Ans: E) many neutrophils can be found at the site of chronic inflammation
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T cells of the immune system include _____
A) CD4, CD8, and plasma cells B) cytotoxic and helper cells C) plasma, antigen-presenting, and memory cells D) lymphocytes, macrophages, and dendritic cells E) class I MHC, class II MHC, and memory cells
Ozone thinning over Antarctica was so profound that people referred to the lowest ozone region as the _________________.
A. ozone pollution layer B. greenhouse effect C. near-ground ozone D. radiation zone E. ozone hole
The pair of traits that best illustrates convergent evolution is
A. a cartilage skeleton in a shark and a bone skeleton in a dolphin. B. an elephant's tusks and a beaver's teeth. C. a lizard's arm and a bird's wing. D. a dragonfly's wing and a butterfly's wing.
Which step involves transformation?
A. Target DNA and plasmid are treated with the same restriction endonuclease. B. The gene is amplified by multiplication of the cloning host. C. The cloning host takes up a plasmid. D. The desired protein is produced by the cloning host. E. Target DNA is removed from cells and isolated.