What is emulsification?
A) the digestion of food inside vacuoles
B) the breaking up of fat molecules
C) the secretion of digestive enzymes in the stomach
D) the involuntary movement of a bolus through the alimentary canal
B
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Two evolutionary hypotheses on the function of fever have been suggested: A fever may reflect manipulation of the host by the pathogen, to the pathogen's benefit, or a fever may be an adaptive response by the host to help to control the pathogen
itself. Studies on whether the use of fever-reducing drugs were helpful or interfered with the body's ability to fight the pathogen ________. A) supported the hypothesis that fevers are a manipulation of the host by the pathogen B) supported the hypothesis that fevers are an adaptive response to the pathogen C) supported both of these hypotheses, but in different contexts D) were inconclusive
A population reaches a stable-age distribution when the
A) population stops growing. B) birthrate is less than the death rate. C) net reproductive rate (R0 ) is zero. D) proportion of individuals in each age group remains the same.
Most antipsychotic medications act by blocking _________ receptors.
A) serotonergic B) dopaminergic C) cholinergic D) muscarinic
Watson and Crick developed a model of DNA in which the two strands twist into the shape of a ________.
A. double helix B. circle C. double pleated sheet D. helix