How does the liver produce urea?
A) The liver rapidly combines ammonia with oxygen
B) The liver rapidly combines ammonia with uric acid
C) The liver rapidly combines ammonia with creatine phosphate
D) the liver rapidly combines the ammonia with carbon dioxide
Ans: D) the liver rapidly combines the ammonia with carbon dioxide
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The phenotypic differences between chimps and humans is best explained by _____
a. the high variation in the number of different genes between the two species b. the high number of inversion sequences c. epistatic changes to genes d. patterns of gene expression and regulation e. the large amount of "junk DNA" found in chimpanzee genomes
Which of the following is important in the treatment of potential infections by Clostridium tetani?
A. Prophylactic use of antitoxin B. Proper care of wounds contaminated with soil C. Administration of penicillin D. All of the choices are important in the treatment of potential infections by Clostridium tetani.
The difference between a population and a community in the same location is that
A. a community is an isolated subpopulation of a larger population of a species. B. a population includes members of one species, while a community includes its nonliving environmental resources. C. a population includes all the living organisms, while a community is the physical location in which they live. D. a community includes members of one species, while a population includes multiple species. E. a population includes members of one species, while a community includes populations of multiple species.
The molecule that carries each amino acid to its correct position along mRNA in the cytoplasm is
A. tRNA. B. mRNA. C. ATP. D. ribosomal RNA.