Question

During evolution, the first cellular form of life appeared before how many million years?

• A. 2000
• B. 3000
• C. 4000
• D. 4500

Answer 1

Answer:

A. 2000

• It was 2000 million years back, when the first cellular form of life appeared.

• First non-cellular form of life originated about 3000 million years.

• Life appeared on earth about 4000 million years.

• The Earth was formed 4500 million years ago.