本题目来源于试卷: SL/HL Topic C3.1 Integration of body systems，类别为 IB生物学
[问答题]
9. Plant growth is coordinated by various signalling chemicals. These chemicals cause growth responses which require a coordinated response. Outline how coordination is achieved in the following responses:
d. Auxin effluent pumps and the positive phototropic response of(0vbol jbg* m -gdgo ffy6:(6n a s,9hx g6to- mcntem.
参考答案: Auxin effluent carriers can be transferred from one side of the cell to another.
Auxin effluent pumps create a differential in auxin concentrations in cells/areas of the stem.
The auxin concentration difference causes unequal growth/bending of the shoot/phototropic response due to unequal growth (of cells).
本题详细解析:
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