Zoology-Origin of Life
NEET Zoology Origin of Life MCQ Question
Type: MCQ-numerical-Hard-Class 12
If the first cellular form of life originated 2000 million years ago, how many years after the formation of Earth did this occur?
A
5 billion years
B
0 billion years
C
5 billion years
D
0 billion years
Correct Answer
Option A
Detailed Explanation
Earth formed about 4.5 billion years ago and the first cellular form of life appeared 2.0 billion years ago. Therefore, the time difference is 4.5 - 2.0 = 2.5 billion years.
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