BSCS Biology: A Molecular Approach

Chapter 17: The Origin of Life

Evolution of Life on Earth

1.
Ultraviolet radiation reached the surface of the earth when it was first formed, because there was no protective ____ layer in the atmosphere.
A)mesh screen
B)oxygen
C)nitrogen
D)ozone
2.
Most scientific research on the origin of life has focused on the explanation that it came from where?
A)God
B)nonliving substances
C)outer space
D)the moon
3.
The Murchison meteorite, shown here, is significant because it contained the first ____ detected in an object from space.
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A)organic compounds
B)formaldehydes
C)oxygen
D)complex polymers
4.
Who conducted successful experiments demonstrating the plausibility of Step 1 in the Oparin-Haldane hypothesis, that organic molecules could be produced by nonbiological processes?
A)Stanley Miller and Harold Urey
B)Cyril Ponnamperuma
C)A.G. Cairns-Smith
D)Alexander Oparin
5.
For something to be ____, it must be able to reproduce itself, acquire mutations that can be passed on to its offspring, and be subject to natural selection.
A)alive
B)organic
C)hydrothermal
D)inherited
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