Life on the earth appeared around how many years before the present?
(a) 13.7 billion
(b) 3.8 million
(c) 4.6 billion
(d) 3.8 billion
NCERT Solutions for Class 11th Geography Fundamental of Physical Geography Chapter 2 Exercise 1(v)
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3.8 billion years ago
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Answer:
The correct answer is d) '3.8 billion years'.
Explanation:
Earth has formed '4.6 billion years' ago. Life appeared on Earth '3.8 billion years' ago.
The earliest form of life that existed on earth has evidence in the form of 'biogenic carbon signatures' and 'stromatolite fossils'.
Life first came into being when the entire earth was covered with water, a condition known as Hot Dilute Soup. The first form of life that floated in this Hot Dilute Soup was the Coacervates, which were a simple combination of protein, carbohydrate and lipid molecules.
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