Multiple Choice
Which of the following best describes the mechanism of electrophilic addition in alkenes?
3. Acids and Bases
Organic Chemistry Reactions
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How would the extinction of photosynthetic organisms affect Earth's atmosphere?
A
It would result in a decrease in atmospheric carbon dioxide levels.
B
It would cause an increase in atmospheric nitrogen levels.
C
It would have no significant impact on atmospheric composition.
D
It would lead to a decrease in atmospheric oxygen levels.
Verified step by step guidance1
Understand the role of photosynthetic organisms: Photosynthetic organisms, such as plants, algae, and cyanobacteria, play a crucial role in converting carbon dioxide (CO₂) into oxygen (O₂) through the process of photosynthesis.
Consider the chemical equation for photosynthesis: The general equation for photosynthesis is 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂. This shows that photosynthesis consumes carbon dioxide and produces oxygen.
Analyze the impact of extinction: If photosynthetic organisms were to become extinct, the process of photosynthesis would cease, leading to a reduction in the production of oxygen.
Evaluate atmospheric changes: With the cessation of oxygen production, atmospheric oxygen levels would decrease over time, as oxygen is continuously consumed by respiration and other processes.
Conclude the effect on Earth's atmosphere: The extinction of photosynthetic organisms would lead to a decrease in atmospheric oxygen levels, significantly impacting the composition of Earth's atmosphere.
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