BI-2042
Why life depends on photosynthesis
Biology · Secondary 4 · Hard · Why life depends on photosynthesis
In a temperate forest at location X, the concentration of carbon dioxide in the atmosphere is lowest in mid-summer and highest in mid-winter. Which explanation best accounts for this pattern?
- Plants photosynthesise more in summer than in winter, so they remove more carbon dioxide from the air in summer.
- Plants photosynthesise only in winter and not in summer, so they remove carbon dioxide only in winter.
- Animals hibernate in winter, so they stop producing carbon dioxide completely then.
- There is no decomposition in summer, so no carbon dioxide is released at that time.
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