Where a plant's material actually comes from
Most people assume a plant's material comes from the soil, but that's not quite right: a growing plant gets most of the material it's made of from air and water, not from the ground it's planted in. Soil mainly supplies water and a few extra nutrients, not the bulk of the plant's own matter.
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Midterm
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This final covers a lot of topics, so it's split into 2 parts. Each part includes a question from every one of its topics.
Final, Part 1 of 2
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Final, Part 2 of 2
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