The resting potential of a particular nerve cell is -66 mV. Depolarization of the membrane will shift the membrane potential toward
A) -90 mV.
B) -66 mV.
C) 0 mV.
D) There will be no change.
E) There is not enough information to tell.
C) 0 mV.
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In 95% of cases of Down's syndrome, there is one extra chromosome (number 21) in every cell. This aneuploid condition is most likely the result of
A. failure to suppress DNA replication between meiosis I and meiosis II. B. failure of the chromosomes to assort independently during meiosis. C. failure of 1 homologous pair to segregate during meiosis. D. failure of 2 homologous pairs to segregate during meiosis. E. failure of the cytoplasm to divide at the end of meiosis II. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about meiosis? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Some of the olfactory receptor (OR) genes in humans
A. have been inactivated, reducing our olfactory capabilities compared to other primates. B. have been activated, enhancing our olfactory sense compared to other primates. C. have duplicated more frequently, resulting in increased paralogs compared to other primates. D. have been conserved more rigidly, resulting in increased orthologs compared to other primates.
What is the most ancient group of plants alive today?
a. horsetail b. club moss c. hornworts d. liverworts e. gymnosperms
Which of the following is not a primate characteristic?
A) large litter size B) stereoscopic vision C) rotating shoulders D) flattened nails instead of claws