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The following experiment was performed to test the effect of auxin on plant growth: Study and answer question.

The auxin was dissolved in a gelatin block; gelatin does not affect the biological activity of the auxin. Several plant seedlings were prepared in a gelatin block; gelatin does not affect the biological, activity of the auxin. Several plant seedlings were prepared as described above and growth was measured every 5 days.

Based on the results of the experiment, one can conclude that the tip of the plant contains ....................
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A
Gelatin
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B
Paste
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C
Auxin
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D
None of these
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Solution

The correct option is C Auxin
Based on the results of this experiment, it can be easily concluded that the phytohormone involved is auxin. It is the first hormone in plants, well studied. Auxin causes apical dominance, that is it results in the increase of apical length of stem.

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