Contemporary hypotheses concerned with the origin of life focus on what two characteristics of living systems?
A) energy conversion and biosynthesis
B) self-replication and energy conversion
C) plasma membranes and self-replication
D) growth and development
E) adaptation and responsiveness
Correct Answer:
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Q7: Fossils indicate that the first cells were
Q10: The accumulation of free oxygen in the
Q19: The first cells were
A) autotrophic.
B) parasitic.
C) anaerobic.
D)
Q20: Which step in the evolution of life
Q22: The extensive infolding of eukaryotic membranes form
Q23: The earliest known organism capable of sexual
Q32: The earliest type of eukaryotic organism currently
Q32: Mitochondria resemble bacteria in
A)size.
B)structure.
C)that they contain DNA.
D)that
Q32: Which of the following is the probable
Q37: The figure above represents 
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