10. Differentiate between: - Noon Academy

10. Differentiate between:

Biology | Chemical Coordination in Plants | Class 10 | ICSE | Selina

10. Differentiate between:

(a) Thigmotropism and geotropism

(b) Phototropism and chemotropism

Solution –

( a ) Thigmotropism and geotropism

Thigmotropism	geotropism
directional growth movement of a part of the plant in response to touch of an object	directional growth movement of a part of the plant in response to gravity
Eg. Coiling of tendrils	Eg. Roots grow in downward direction

( b ) Phototropism and chemotropism

Phototropism	Chemotropism
Directional growth movement of a plant part in response to light	Directional growth movement of a plant part in response to chemicals

i

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