Multiple Choice
Microfossil evidence suggests that life
A) originated when the Earth formed 4.6 billion years ago
B) originated about 3.4 billion years ago
C) existed 3.85 billion years ago
D) existed and was well established by 3.4 to 3.5 billion years ago
Correct Answer:
Verified
Correct Answer:
Verified
Q83: Why is the claim of the discovery
Q84: An explosion of genetic diversity similar to
Q85: The first living organisms probably resembled<br>A) single-celled
Q86: What was one reason that RNA was
Q87: In the original Miller-Urey experiment it was
Q89: The oldest hominid so far discovered dates
Q90: Based on current scientific evidence, what is
Q91: The "oxygen crisis" occurred around<br>A) 2 billion
Q92: The Cambrian Explosion began approximately<br>A) 2.1 billion
Q93: One of the first large organisms to