Stanley Miller's experiments were significant because he demonstrated that _____.
A. the behavior of any molecule containing a carbon atom was fundamentally the same
B. under certain circumstances the theory of vitalism was valid
C. a variety of simple organic compounds could be spontaneously synthesized from components in Earth's primitive atmosphere
D. lightning discharges could produce the molecules previously presumed to have originated in volcanic outgassings
E. urea could be synthesized from entirely naturally occurring salts
Answer: C. a variety of simple organic compounds could be spontaneously synthesized from components in Earth's primitive atmosphere
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Much of our understanding of how large organisms respond to environmental variation is based on observations of
model species.
Indicate whether the statement is true or false.VNTRs and STRs differ in that
A) a VNTR repeat is shorter than an STR repeat. B) a VNTR repeat is longer than an STR repeat. C) a VNTR is a type of copy number variant and an STR is not. D) an STR is a type of copy number variant and a VNTR is not.
Which trend best describes the levels of atmospheric CO2 since the start of the Industrial Revolution?
a. gradual decrease b. period fluctuations c. steady increase d. no apparent change
Mutation of the A group gene in Arabidopsis
thaliana affects development in its flower’s a. first whorl only. b. second whorl only. c. third whorl only. d. first and second whorls. e. second and third whorls.