Which organ isn't able to be transplanted from a donor to a recipient?
A) a kidney
B) a heart
C) a liver
D) a brain
D
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Individuals with variations that make them best suited to their environment will, on average, be more likely to
A. be larger B. survive and reproduce C. evolve D. change over time
The first amino acid in most proteins is
a. alanine. b. isoleucine. c. leucine. d. methinonine. e. phenylalanine.
In eukaryotic cells, which occurs during
mitosis? a. the duplication of chromatids b. the replication of DNA c. synapsis and crossing over d. fragmentation and disappearance of nuclear envelope e. all of these
lacI–d mutations
a. can inactivate the repressor even if only one of the four subunits is mutant. b. occur in the region of the gene encoding the inducer binding site. c. are cis-acting. d. can only inactivate the repressor if all four subunits are mutant. e. result in the lac operon being permanently repressed.