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(D) The term $auxin$ was coined by $F.W. Went$ in $1928$. $F.W. Went$ isolated $auxin$ from the tips of $Avena$ coleoptiles. $Charles$ $Darwin$ and hi

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$F$.$W$. Went

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(D) The term $auxin$ was coined by $F.W. Went$ in $1928$. $F.W. Went$ isolated $auxin$ from the tips of $Avena$ coleoptiles. $Charles$ $Darwin$ and his son $Francis$ $Darwin$ observed the coleoptiles of $Phalaris$ $canariensis$ and noted that they responded to unilateral illumination by growing towards the light source. $Boysen$ $Jensen$ demonstrated that the stimulus was a chemical substance that could diffuse through gelatin. $Paal$ showed that the growth curvature was due to the unequal distribution of a growth-promoting substance.

The term $auxin$ was coined by

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