About when did the first animals evolve on Earth, according to current geological understanding?
A) 10 million years ago
B) 60 million years ago
C) 100 million years ago
D) 600 million years ago
Correct Answer:
Verified
Q27: Which of the following statements is true?
A)
Q28: What is the lower mantle made up
Q29: Humans have been on Earth for _
Q30: When did our solar system form?
A) about
Q31: Evidence in the rock record shows that
Q33: About when are Homo sapiens thought to
Q34: How did Earth's atmosphere become oxygenated?
A) volcanic
Q35: Geologic evidence indicates Earth's moon and core
Q36: Approximately when did the mass-extinction event that
Q37: Which class of animals rose to dominance
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