Stanley Miller's experiment was concerned with the idea that
A. life originated in outer space.
B. life originated by biogenesis.
C. life originated by spontaneous generation, but biogenesis followed.
D. organic molecules could be formed from gases in the early atmosphere.
D. organic molecules could be formed from gases in the early atmosphere.
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Which soil horizon is composed of organic litter?
a. A b. B c. C d. D e. E
Which of the following is the type of bond holding K+ and I- ions together in KI?
A) ionic bond B) covalent bond C) hydrogen bond
Which feature do scientists mainly consider when grouping organisms according to evolutionary classification?
a) population size b) common ancestry c) identical niche d) similar bone structure
In the expression C6H12O6 ® 2C2H5OH + 2CO2, the products are
A. C6H12O6. B. C6H12O6 + zymase. C. zymase + 2C2H5OH + 2CO2. D. 2C2H5OH + 2CO2.