When fat enters the duodenum, it stimulates release of which hormone?
a. amylase
b. cholecystokinin
c. gastrin
d. secretin
e. trypsin
B
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What will be an ideal response?
True or False: A small, local population of organisms is very sensitive to drastic environmental changes, but is unaffected by predation
A. true B. false
Which of the following is an advantage of birds traveling in flocks?
A. An individual bird's chance of being eaten by a predator is diminished. B. An individual bird will need to spend less time finding food. C. A flock of birds is like a warning signal to predators not to feed on them. D. An individual bird will have more food available. E. An individual bird's chance of finding a mate will increase.
By their experimentation using the Neurospora fungus, Beadle and Tatum were able to propose the far-reaching hypothesis that ________
A) several different enzymes may be involved in the same step in a biochemical pathway B) more than one codon can specify a given amino acid C) genetic recombination occurred in Neurospora D) prototrophs will grow only if provided with nutritional supplements E) the role of a specific gene is to produce a specific enzyme