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Question

The diffusible substance synthesised in the coleoptile tip causes phototropic bending. This was confirmed by

A
Boysen-Jensen
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B
F.W Went
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C
Paal
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D
Charles Darwin and Francis Darwin
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Solution

The correct option is D Charles Darwin and Francis Darwin
Charles Darwin and his son Francis Darwin confirmed that plants bend towards light, by using coleoptiles of canary grass. They showed that the substance synthesized at coleoptile tip transmitted down and caused the bending

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