Blood vessels that serve as gateways to capillary beds are ________
A) venules B) arterioles C) arteries D) veins
Answer: B
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The complex resulting from complement activity that leads to cell lysis is the
A. prostaglandin complex. B. leukotriene activating complex. C. membrane attack complex. D. histamine complex.
In the accompanying figure, which of the following represents a multicellular, haploid reproductive stage?
a. 1 b. 2 c. 3 d. 4 e. 5
A cell can form 10 nm chromatin fibers, but not 30 nm fibers. Which molecule has likely been removed or mutated in this cell?
A) H1 B) H2A C) H3 D) topoisomerase E) SMC proteins
A confused frog deposits its sperm onto a toad's eggs as they are being laid. No offspring develop because the frog's sperm are unable to penetrate the toad's egg. This is an example of
A. gametic isolation. B. behavioral isolation. C. mechanical isolation. D. habitat isolation. E. temporal isolation.