All of the following were produced in experiments on primitive Earth conditions conducted by Miller-Urey and others, except for
A. prokaryotes.
B. amino acids.
C. organic molecules.
D. urea.
E. hydrogen cyanide.
Answer: A
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Darwin incorporated Malthus' idea that _____ into his theory of evolution
a. humans have the capacity to produce more offspring than the environment can support b. populations will always produce more individuals than the environment can support c. humans will only produce the number of individuals that the environment can support d. populations will never produce offspring in stressful environments e. populations under environmental stress will become extinct
Germany is a very affluent European nation, so we would assume that its ecological footprint would most likely be ________
Fill in the blank(s) with correct word
What is the main function of the ribosomes in the cell?
A. to synthesize DNA B. to provide strength and structural support for the cell membrane C. to synthesize proteins D. to break down proteins into individual amino acids E. to form the nuclear envelope
A diagnostic sign of measles are (herpangina/Koplik's spots/macules) in the mouth.
Fill in the blank(s) with the appropriate word(s).