Went demonstrated the role of auxins using ..............

Root tips

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Coleoptiles

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Callus tissue

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Lateral meristems

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Solution

The correct option is B Coleoptiles
Went explained about activity of auxin with the help of assay on coleoptile. The Avena geo-curvature test is a bioassay for auxin-type growth regulators. Etiolated oat coleoptiles are used and the test is conducted in special perspex trays under diffuse day light.

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