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    "Triple response," a key reaction of ethylene, is characterized by:
    Question

    "Triple response," a key reaction of ethylene, is characterized by:

    A.

    Plumule hook opening, positive gravitropism and internodal elongation.

    B.

    Excessive cytokinesis, negative phototropism and parthenocarpy.

    C.

    Inhibition of stem elongation, promotion of lateral swelling of stems, and reduced sensitivity of stems to gravitropic stimulation.

    D.

    Fruit ripening, plumule hook opening and negative phototropism.

    Correct option is C

    The "triple response" of ethylene involves the inhibition of stem elongation, lateral swelling of stems, and reduced sensitivity to gravitropism, enabling plants to adapt to mechanical stress or obstacles in their growth path.

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