Name a hormone which A.is gaseous in nature B. is responsible for phototropism C. induces femaleness in flowers of cucumber D. is used for killing weeds (dicots) E. induces flowsering in long day plants
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A. Ethylene is a hormone which is gaseous in nature B. Auxin (synthetic auxin 2-4 D) is responsible for photoropism and geotropism in plants can increase the number of female flowers and hence fruits as in cucumber . D. Synthetic auxin (2-4 d)kills broad leaved dicot weeds hence used as weedicides E. Gibberellins induces flowering in long plants.
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