If the Tn10 transposon is used to mutagenize a bacterium for the purpose of creating a mutation in the his operon, what would be the most appropriate selection media?
A) rich media that contains all of the amino acids supplemented with tetracycline
B) minimal media supplemented only with histidine
C) minimal media supplemented with tetracycline and histidine
D) minimal media supplemented with tetracycline alone
C) minimal media supplemented with tetracycline and histidine
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A patient reports an inability to feel or recognize expressions of fear in others. Damage to which structure in the brain could be responsible for these symptoms?
a. cerebellum b. brainstem c. amygdala d. hypothalamus
The levels of cerain ions in the blood are regulated by the kidneys and help determine?
a. Emptying of the bladder b. Blood sugar levels c. Body temperature d. blood pressure
What benefit do animals get from having very long loops of the nephron?
A) They can send more glucose back to circulation. B) They make less nitrogenous waste products. C) They can send more water back to circulation. D) They can excrete more salt.
Which muscle component is smallest?
A) myofibril B) myosin filament C) sarcomere D) muscle fiber