Chapter 12 Flashcards by Crystal fall

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Q

Tropism

A

growth of plant in response to directional stimulus

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Q

Phototropism

A

growth movement of plant in response to directional light stimulus

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Q

Geotropism

A

growth movement of plant in response to directional gravitational stimulus

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Q

Coleoptile

A

protective sheath of first cereal seedling leaves, used in tropism experiments

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Q

Hormone

A

chemical messenger in blood (animals) chemical messenger affecting growth (plants)

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Q

Auxin

A

plant hormone involved in tropisms and other growth responses

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Q

Plant growth substances

A

‘hormones’, affect various plant growth aspects

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