During evolution, the first cellular form of life appeared before how many million years?(a) 2000(b) 3000(c) 4000(d) 4500This question was addressed to me in a national level competition.I'd like to ask this question from Evolution topic in chapter Evolution of Biology – Class 12

During evolution, the first cellular form of life appeared before how

1.	During evolution, the first cellular form of life appeared before how many million years?(a) 2000(b) 3000(c) 4000(d) 4500This question was addressed to me in a national level competition.I'd like to ask this question from Evolution topic in chapter Evolution of Biology – Class 12
Answer» The CORRECT ANSWER is (a) 2000 The best explanation: 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.

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