Chapter 32 - Plant Responses Flashcards

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1
Q

Stimulus

A

anything that causes a reaction in an organism or in any of its parts

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2
Q

Response

A

the activity of a cell or organism as a result of a stimulus

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3
Q

Tropism

A

a change in the growth of a plant in response to an external stimulus

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4
Q

Positive Tropism

A

growth is towards stimuli

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5
Q

Negative tropism

A

growth is away from stimuli

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6
Q

Phototropism

A

the change in growth of a plant in response to light

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7
Q

Geotropism

A

the change in growth of a plant in response to gravity

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8
Q

Thigmotropism

A

the change in growth of a plant in response to touch

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9
Q

Hydrotropism

A

the change in growth of a plant in response to water

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10
Q

Chemotropism

A

the change in growth of a plant in response to chemicals

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11
Q

Growth regulator

A

chemical that controls the growth of a plant

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12
Q

Growth promotor

A

a chemical that causes an increase in growth in plants

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13
Q

Growth inhibitor

A

chemical that causes a reduction in growth in plants

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