15. which of the following accurately reflects the beliefs on earth's early history?
a. scien...
15. which of the following accurately reflects the beliefs on earth's early history?
a. scientists believe that microspheres nearly prevented the development of early life.
b. scientists believe oxygen was plentiful in the early atmosphere.
c. scientists believe the early atmosphere lacked the oxygen necessary to support modern human life.
d. scientists believe that dna may have existed before rna
Answers: 1
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