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Gaokao Biology Practice Question

3.植物激素通常与其受体结合才能发挥生理作用。喷施某种植物激素，能使某种作物的矮 生突变体长高。关于该矮生突变体矮生的原因，下列推测合理的是（）

  1. A.赤霉素合成途径受阻
  2. B.赤霉素受体合成受阻
  3. C.脱落酸合成途径受阻
  4. D.脱落酸受体合成受阻

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