Some eukaryotic DNA sequences act as introns in the cells of some tissues and exons in the cells of
other tissues. This allows:a.
prevention of harmful mutation.
b. regulation of the rate of transcription.
c. formation of different types of closely related proteins.
d. regulation of the rate of translation.
e. repression of DNA replication.
C
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While running, ____
a. only diastolic blood pressure increases b. only systolic blood pressure increases c. both diastolic and systolic blood pressures increase d. both diastolic and systolic blood pressures decrease e. there would be no change in either diastolic or systolic blood pressure
__________ is one form of learning that happens only during a sensitive period early in life. Fill in the blank(s) with the appropriate word(s)
The actions of insulin and glucagon are
a. synergistic. b. antagonistic. c. cooperative. d. permissive. e. mutualistic
Which organ is responsible for the cleanup of destroyed red blood cells?
a. spleen b. kidney c. bone marrow d. heart e. lungs