Which cellular component of blood acts in blood clotting?
A. White blood cells
B. Red blood cells
C. Platelets
D. Plasma cells
E. Hemostatic cells
Answer: C
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The solidifying agent used most successfully in bacterial nutrient media is
A. gelatin. B. peptone. C. agar. D. starch.
The advantage of light microscopy over electron microscopy is that
a. light microscopy provides for higher magnification than electron microscopy. b. light microscopy provides for higher resolving power than electron microscopy. c. light microscopy allows one to view dynamic processes in living cells. d. both A and B e. both B and C
How does polyploidy differ from aneuploidy?
A. Polyploidy involves diploid chromosome sets, while aneuploidy involves haploid sets. B. Polyploidy involves changes in entire chromosome sets; aneuploidy involves less than a diploid set of chromosomes. C. Polyploidy involves monosomy; aneuploidy involves trisomy. D. Polyploidy is produced by translocations; aneuploidy by nondisjunction. E. None of these is a difference between polyploidy and aneuploidy.
A high concentration of chlorophyll embedded in the plasma membrane fold of a newly discovered species of bacteria suggests a
A. Chemolithoautotrophic metabolism B. Photoautotrophic metabolism C. Chemoheterotrophic metabolism D. Photoheterotrophic metabolism