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All plants "know" what is going on because they respond to sunlight, water, pressure and danger. Sunflowers turn their flowers so that the center of the flower stays within the strongest part of the sunlight.

They also respond to water by sending roots out towards any that is nearby. They respond to pressure by growing away from it, as in up out of the soil and around rocks and buildings and things. They respond to being cut or chewed by putting out new shoots or branches.

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9y ago

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