Evolution: Origin of Life, Evidences and Mechanisms (NCERT Class 12)

This topic covers the NCERT Class 12 chapter on Evolution, tracing the story from the origin of the universe and life on Earth through the theories and evidences that explain how life forms evolved. It includes the Big B…

• Evolutionary biology is the study of the history of life forms on earth.
• The universe is about 13.8 billion years old; earth formed about 4.5 billion years ago.
• Life appeared about 500 million years after earth's formation, i.e., almost 4 billion years ago.

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