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Roots grow down and shoots grow up in answer to the pull of the earth. This is:
AHydrotropism
BChemotropism
CThermotropism
DGeotropism
Answer & Solution
Correct answer: D. Geotropism
1. The stimulus here is gravity, the pull of the earth.
2. Growth responds by direction.
3. So this is geotropism.
_Source: syllabus Science Class X, Chapter 7, Control and Coordination._
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