The enzyme that clots plasma is ________.
A. coagulase
B. catalase
C. kinase
D. staphylokinase
E. hyaluronidase
Answer: A
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Two species of closely related squirrels both feed on acorns produced by oak trees. One species feeds exclusively near
the top of the tree and the other feeds exclusively towards the bottom of the tree. This is an example of ____.
a. competitive exclusionb. resource partitioning c. mutualism d. commensalism e. mimicry
Which of the following pigments would you find in a typical leaf?
a. chlorophyll, xanthophyll, phycobilins. b. chlorophyll a, chlorophyll b, carotenoids. c. phycocyanin, xanthophyll, fucoxanthin. d. carotenoids, chlorophylls, phycoerythrin.
Based on this graph, what is the relationship between metabolic rate and body temperature?
A) When metabolic rate drops, so does body temperature. B) When metabolic rate drops, body temperature rises. C) When metabolic rate drops, body temperature remains constant.
When examining the complete genome sequence of E. coli 0157:H7, a researcher notes that only one of two possible codons coding for lysine is observed in the genome. This is likely the result of:
a. mutational bias. b. this gene being highly expressed. c. unequal abundances of transfer RNA. d. selection against slip-stand mutations. e. All of the above.