Biology / Bio 2583 · Atom · ~20 seconds
Photosynthesis Supplies a Plant's Mass, Not Soil
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Photosynthesis, per Bio 0579, converts carbon dioxide into carbohydrate, and that carbon — not soil — accounts for most of a plant's dry mass.
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Soil still supplies water and minerals, per Bio 2573, but these form only a small fraction of dry weight.
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"Plants get mass from soil," per Bio 2581, confuses soil's nutrient-and-water role with photosynthesis's role as the mass-building reaction.