Zoology-Origin of Life
NEET Zoology Origin of Life MCQ Question
Type: MCQ-numerical-Easy-Class 12
If the Earth was formed approximately 4.5 billion years ago and the first cellular form of life appeared about 2000 million years ago, how many billion years after the formation of Earth did the first cellular form of life appear?
A
5 billion years
B
2 billion years
C
5 billion years
D
3 billion years
Correct Answer
Option A
Detailed Explanation
The Earth was formed 4.5 billion years ago, and the first cellular form of life appeared 2000 million years ago, which is 2 billion years. Therefore, 4.5 billion - 2 billion = 2.5 billion years after Earth's formation.
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