प्रारंभिक वातावरण में मुक्त ऑक्सीजन बहुत कम क्यों थी?
Why was free oxygen very low in the early atmosphere?
Explanation opens after your attempt
C. क्योंकि प्रकाश संश्लेषी जीव अभी व्यापक नहीं थेBecause photosynthetic organisms were not yet widespread
Concept
Before photosynthetic organisms spread free oxygen was low. Exam tip: link oxygen rise with photosynthesis.
Why this answer is correct
The correct answer is C. क्योंकि प्रकाश संश्लेषी जीव अभी व्यापक नहीं थे / Because photosynthetic organisms were not yet widespread. Before photosynthetic organisms spread free oxygen was low. Exam tip: link oxygen rise with photosynthesis.
Exam Tip
प्रकाश संश्लेषण करने वाले जीवों के फैलने से पहले मुक्त ऑक्सीजन कम थी। परीक्षा में ऑक्सीजन वृद्धि को प्रकाश संश्लेषण से जोड़ें।
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