Question detail
What role did photosynthetic organisms play in the increase of atmospheric oxygen?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
The composition and evolution of the Earth's atmosphere
Question
- A. They consumed oxygen during respiration.
- B. They produced oxygen as a byproduct of photosynthesis.
- C. They released carbon dioxide into the atmosphere.
- D. They absorbed nitrogen from the atmosphere.
Answer
The correct option is They produced oxygen as a byproduct of photosynthesis.. This answer is correct because it matches the approved learning objective to link the increase in atmospheric oxygen to the development of more complex life in the subtopic How oxygen increased.
Explanation
The correct option is They produced oxygen as a byproduct of photosynthesis.. They produced oxygen as a byproduct of photosynthesis. is correct because it directly supports the approved learning objective to link the increase in atmospheric oxygen to the development of more complex life. This belongs to the subtopic How oxygen increased within The composition and evolution of the Earth's atmosphere, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from How oxygen increased.
Common mistake
Linking Oxygen Increase to Life
Students often confuse the increase in atmospheric oxygen with the presence of life rather than understanding that the increase in oxygen levels was a result of photosynthetic organisms, which allowed for the development of more complex life.
To fix this, students should focus on the role of photosynthesis in producing oxygen and how this oxygen enabled the evolution of more complex organisms.
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