How long are most donated tissues able to be stored?
A) a week
B) a month
C) a year
D) 5 years
D
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An inhibitory postsynaptic potential (IPSP) occurs in a membrane made more permeable to _____
A) potassium ions B) sodium ions C) calcium ions D) ATP E) all neurotransmitter molecules
Because the two strands of a DNA molecule are ________ to each other, either one can be used as a template to reconstruct the other.
A. identical B. antiparallel C. bound D. complementary
Which of the following is not evidence supporting the Lyon hypothesis of X inactivation?
A. Female mammals that are heterozygous for X-linked traits are phenotypically mosaics. B. A highly condensed structure is consistently observed in female cells, but not in male cells. C. A female cat that is homozygous for coat color cannot produce calico offspring. D. Calico patterns of coat color are never exactly the same. E. A genetically normal male cat can never be calico.
Most biologists now agree that the common ancestor of all animals was probably a eumetazoan
a. True b. False