A student places a green plant in a sealed glass container in bright light. Which change in gas composition would be expected inside the container over several hours?

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Question

A student places a green plant in a sealed glass container in bright light. Which change in gas composition would be expected inside the container over several hours?

Accepted Answer

B) Oxygen increases and carbon dioxide decreases — In bright light, the rate of photosynthesis exceeds the rate of respiration, so oxygen is released and carbon dioxide is consumed, causing oxygen levels to rise and carbon dioxide levels to fall. Option A describes what would happen in darkness when only respiration occurs.

Answer

B) Oxygen increases and carbon dioxide decreases

Answer

A) Oxygen decreases and carbon dioxide increases

Answer

D) Both oxygen and carbon dioxide decrease

Answer

C) Both oxygen and carbon dioxide increase

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