When did first non-cellular life form originate on earth?

2 billion years ago

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3.5 billion years ago

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1 billion years ago

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3 billion years ago

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Solution

The correct option is D 3 billion years ago
The universe is about 20 billion years old and the first non-cellular form of life originated about 3 billion years ago. Photosynthetic bacteria appeared 3.3-3.5 billion years ago.
So, the correct answer is "3 billion years ago".

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Similar questions

Match the events leading to the origin of life listed under column I with the time frame given under column II; choose the right answer which gives the correct combination of the alphabets of the two columns:

$\begin{matrix} C o l u m n I & C o l u m n I I E v e n t s & T i m e F r a m e A & O r i g i n o f u n i v e r s e & p & 3 b i l l i o n y e a r s a g o B & O r i g i n o f e a r t h & q & 4.6 b i l l i o n y e a r s a g o C & O r i g i n o f s t a r s & r & 10 b i l l i o n y e a r s a g o D & O r i g i n o f l i f e & s & 14 b i l l i o n y e a r s a g o t & 5 b i l l i o n y e a r s a g o \end{matrix}$

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When did first non-cellular life form originate on earth?

The correct option is D 3 billion years agoThe universe is about 20 billion years old and the first non-cellular form of life originated about 3 billion years ago. Photosynthetic bacteria appeared 3.3-3.5 billion years ago. So, the correct answer is "3 billion years ago".

The correct option is D 3 billion years ago
The universe is about 20 billion years old and the first non-cellular form of life originated about 3 billion years ago. Photosynthetic bacteria appeared 3.3-3.5 billion years ago.
So, the correct answer is "3 billion years ago".