What is the frequency of the a allele in the butterfly population?
A) 0.16
B) 0.04
C) 0.40
D) 0.64
E) 0.40
C
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Cells undergo exocytosis ____
a. to pump protons down a concentration gradient b. when replicating c. to secrete protein and wastes from the cell d. to ingest nutrients e. as a means of cellular protection
What radiolabeled substance did Hershey and Chase use to label the protein component of the bacteriophage in their study to determine whether protein or DNA was necessary for phage production?
A) nitrogen B) carbon C) sulfur D) phosphorus E) iodine
The appendix is a vestigial structure that extends off of the
a. cecum. b. colon. c. duodenum. d. rectum. e. stomach.
What is the physiological cause of a heart attack?
A) rupture of coronary arteries B) a blood clot moving through the heart C) a blood clot lodging in a blood vessel supplying the heart D) scar tissue in the heart muscle