Which cell type works to prevent our immune system from attacking self and from over-reacting to nonthreatening substances, is abundant in tissues next to body openings, and phagocytizes a broad range of antigens?
A) macrophages
B) natural killer cells
C) lymphocytes
D) monocytes
E) dendritic cells
Answer: E
Biology & Microbiology
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Formation of a new septum with each mitotic division occurs in:
A. ascomycetes and basidiomycetes. B. ascomycetes. C. basidiomycetes. D. glomeromycetes. E. ascomycetes, basidiomycetes, and glomeromycetes.
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A clownfish may lure fish towards a sea anemone and get scraps of food in return. What kind of symbiotic relationship does this demonstrate?
a. Commensalism b. Mutualism c. Parasitism d. None of these choices
Biology & Microbiology
A 5% urea solution is hypotonic to a 10% urea solution.
a. true b. false
Biology & Microbiology
The “lub” heart sound is produced by closure of the ____________________ valves. Fill in the blank(s) with the appropriate word(s)
Biology & Microbiology