Which scientists observed that the coleoptile | vedclass

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(A) Charles Darwin and his son Francis Darwin observed that the coleoptiles of canary grass $(Phalaris 	ext{ canariensis})$ respond to unilateral ill

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Charles Darwin and Francis Darwin

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(A) Charles Darwin and his son Francis Darwin observed that the coleoptiles of canary grass $(Phalaris 	ext{ canariensis})$ respond to unilateral illumination by growing towards the light source (phototropism). They concluded that the tip of the coleoptile was the site of transmittable influence that caused the bending of the entire coleoptile.

Which scientists observed that the coleoptiles of canary grass respond to unilateral illumination by growing towards the light source?

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