Among the easiest of the mutations to isolate are those which
A. involve haploid chromosomes.
B. involve antibiotic resistance.
C. allow populations to be measured.
D. use an indirect method for measurement.
E. involve haploid chromosomes AND involve antibiotic resistance.
E
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Which one of the following interactions is not a stabilizing force at the tertiary level of protein organization?
A. an ionic bond between a positively charged side chain and a negatively charged side chain B. hydrophobic clustering of non-polar side chains in the interior of a protein C. hydrogen bonding between a carbonyl oxygen of one peptide bond and an amide hydrogen of a nearby peptide bond D. disulfide linkages between cysteine residues E. van der Waals interactions between side chains in close proximity
As a result of a tariff, domestic consumers buy
a. fewer units at a higher price. b. fewer units at a lower price. c. more units at a lower price. d. more units at a higher price.
Which cells target parasites and worms?
a. eosinophils b. B and T cells c. macrophages d. phagocytes e. cytokines
Plants in some biomes are adapted to low levels of precipitation. In which biome is low precipitation an abiotic factor?
a) coniferous forest b) tropical forest c) desert d) chaparral