How old is the first evidence of life on earth?
A) 10,000 years
B) 5 million years
C) 3.6 billion years
D) 15 billion years
Correct Answer:
Verified
Q10: The earth was formed about
A)1 million years
Q11: At the time the earth was formed,the
Q12: The heavy elements that now make up
Q13: Most of the history of life on
Q14: The extinction that wiped out the dinosaurs
Q16: The formation of the "supercontinent" of Pangea
A)was
Q17: The earth's continents drift because
A)they are actually
Q18: The sudden appearance of organisms with shells
Q19: Sexual reproduction probably evolved
A)to increase genetic variation.
B)to
Q20: The mass extinction of 65 million years
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