Starting with Charles Darwin (Charles Darwin) 2423 year (1880) British naturalists observe the head or neck, complex phathai (coleoptile) of the plant family, catnip (canary grass), sit toward the light always. Darwin has an opaque paper covers the section of the neck, complex phathai, it appears that the exposure of the neck MIDI phathai not bend toward the light. Later, Darwin has cut part of the neck, then dropped the light complex, it appears that phathai plants did not have to bend toward the light, the same.
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