Using the labels in the accompanying figure, where are chloroplasts found in the greatest density?
a. 1 and 2
b. 3 and 4
c. 4 and 5
d. 6 and 7
e. 7 and 8
b
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The similarity of the embryos of chickens and humans is evidence of ________.
A. artificial selection B. decreased genetic variation C. genetic drift D. common ancestry
Which of the following is (are) false regarding
smoking marijuana? a. It is safer than cigarette smoking. b. Tar is more abundant in marijuana smoke than in cigarette smoke. c. Chronic marijuana smokers accumulate more tar in their lungs than comparable chronic cigarette smokers. d. Marijuana smokers risk psychological dependency. e. All of these are false.
The products of the process in Figure 3-1 are:a
amino acids. b. molecules of glycerol. c. representative of a glycoside linkage. d. enzymes. e. monosaccharides
Translational controls regulate:a
the activity of a protein end-product that is produced. b. the rate at which an mRNA molecule is translated. c. the rate at which an mRNA molecule is synthesized. d. the uptake of nucleic acids into the cell. e. the attachment of phosphate groups to polypeptides