Which microscope achieves the greatest resolution and highest magnification?
A. electron
B. bright-field
C. fluorescence
D. phase-contrast
E. dark-field
Answer: A
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Genetic disorders such as Tay-Sachs disease, Bloom syndrome, Gaucher disease, and Canavan disease are more common in Ashkenazi Jewish populations because
A) spontaneous mutations occur more frequently in this group. B) the gene pool has been highly variable over thousands of years. C) microevolution has not influenced this culture. D) their history includes several population bottlenecks.
Due to a rapid change in the environment, a population of ants was reduced from one million to one thousand. What
type of genetic drift will occur in the gene pool of this population when it expands again? a. gene flow b. migration c. natural selection d. the founder effect e. a genetic bottleneck
Members of which group are known to form blooms known as red tides?
a. green algae b. red algae c. euglenoids d. dinoflagellates e. brown algae
Reactants are converted to products by
A. enzymes releasing energy. B. reactants releasing energy. C. enzymes binding to reactants. D. breaking and forming bonds.