Noneukaryotic cells lack
A. granules.
B. a nucleus.
C. flagella.
D. All of these answers are true.
B. a nucleus.
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True or false: The same strand in a DNA double helix is used as the template strand for transcription of every gene in a given chromosome
A. true B. false
What causes climate fluctuations described by the Milankovitch cycles?
a. large colonies of oceanic algae b. changes in solar radiation due to sun spots c. minor changes in the Earth’s orbit d. methane emissions from cattle
Angina pectoris is
A. another term for "chest pain." B. the muscle tissue that lines the right side of the heart. C. when blood leaks back into the atria because the valves are leaky. D. when a blood vessel bursts in the brain. E. the muscle tissue that lines the left side of the heart.
The notion that organisms that are more distantly related should have time to accumulate more biochemical differences than those more closely related can best be illustrated using
A. radioactive isotope dating. B. a molecular clock. C. gel electrophoresis. D. a geologic time scale.