Experience with dog breeding has taught geneticists ________
A) that, given enough time, any desired trait can be bred into dogs
B) that purebred dogs have offspring with qualities identical to the parents, because all purebred dogs are alike genetically
C) that, while physical traits can be molded through artificial selection, behavioral traits cannot
D) that geographically isolated groups of dogs may be selected for quite different traits, resulting in a different dog breed
D
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What feature of the double-stranded DNA helix suggested to Watson and Crick a mechanism by which DNA could be replicated?
What will be an ideal response?
Which of the following is a major difference between prokaryotic cells and eukaryotic cells?
A) Prokaryotes have cells while eukaryotes do not. B) Eukaryotic cells have more intracellular organelles than prokaryotes. C) Prokaryotes are not able to carry out aerobic respiration, relying instead on anaerobic metabolism. D) Prokaryotes are generally larger than eukaryotes.
In building a confidence interval for the ATE of an experiment, what object will determine the spread of the confidence interval?
A. Average outcome for the treated group B. Sample standard deviation for the treated group C. Average outcome for the control group D. Null hypothesis value
Which of the following conditions is likely to decrease the likelihood of skeletal muscle contraction?
(a) partial depolarization of the T-tubule membrane, such that the resting potential is closer to zero (b) addition of a drug that blocks Ca2+ binding to troponin (c) an increase in the amount of ATP in the cell (d) a mutation in tropomyosin that decreases its affinity for the actin filament