Question
The existence of plant hormones was/were first observed by
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Charles Darwin
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Francis Darwin
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Darwin and Francis Darwin
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Kogl
Answer
(c) Darwin and Francis Darwin
Explanation:
The existence of plant hormones was first observed by Charles Darwin and his son Francis Darwin in 1880. They observed that coleoptiles (the protective sheath enclosing the emerging shoot tip of a grass or cereal) could bend towards light, even if the tip of the coleoptile was removed.
