Early organisms turned _______ into oxygen, making life suitable for other organisms.A.siliconB.sulfurC.nitrogenD.carbon dioxide
Question
Early organisms turned _______ into oxygen, making life suitable for other organisms.
A. silicon
B. sulfur
C. nitrogen
D. carbon dioxide
Solution
The correct answer is D. carbon dioxide.
Explanation:
Early organisms, specifically cyanobacteria, are known for their ability to perform photosynthesis. They utilize carbon dioxide (CO₂) from the atmosphere and water (H₂O) to produce glucose (C₆H₁₂O₆) and oxygen (O₂). The photosynthetic process can be summarized by the following chemical equation:
As a byproduct of photosynthesis, oxygen was released into the atmosphere, gradually increasing the levels of oxygen available. This significant development played a crucial role in shaping Earth's atmosphere and environments, allowing for more complex life forms to evolve. The rise of oxygen levels contributed to the Great Oxygenation Event, which transformed the planet’s ecosystems and paved the way for aerobic organisms.
Final Answer
D. carbon dioxide
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