The human temperature set point typically ____
a. ranges from about 96.0?F to about 99.9?F
b. stays right at about 98.6?F
c. stays right at about 96.8?F
d. ranges from about 98.0?F to about 99.5?F
e. ranges from about 94.0?F to about 99.0?F
ANSWER: a
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Which of the following is not an enzymatic function of the editosome?
A. uridylyltransferase B. ligase C. deaminase D. exoribonuclease
Birds utilize mechanisms similar to countercurrent exchange to optimize diffusion of O2 across their respiratory
surfaces.
Indicate whether the statement is true or false.Suppose a geneticist sequences a specific gene region in two species, A and B, previously known to be closely related. He specifically wants to see which of the two species is closer to an ancestral species
The sequence comparison showed that this region in species B has an extra intron, unlike other near relatives, but that otherwise A and B are virtually the same for this region. Based on this data alone, he could reason that which species was more likely ancestral?
The amino acid sequence of cytochrome c is exactly the same in humans and chimpanzees. There is a difference of 13 amino acids between the cytochrome c of humans and dogs, and a difference of 20 amino acids between the cytochrome c of humans and rattle snakes. Which of the following is best supported by these data?
a. Rattlesnakes apparently gave rise evolutionarily to the dog, chimpanzee, and human. b. Cytochrome c apparently has an entirely different function in rattlesnakes than in mammals, which explains the difference in the number of amino acids. c. Cytochrome c is not found universally in animals. d. Cytochrome c from a rattlesnake could function in a dog, but not in a chimpanzee. e. The human is apparently more closely related to the chimpanzee than to the dog or rattlesnake.