Science 7—Chapter 8 Plant Processes an Reproduction

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Presentation transcript:

Science 7—Chapter 8 Plant Processes an Reproduction Lesson 2 Plant Responses

plant hormones produced by root tips that increase the rate of cell division

cytokinins plant hormones produced by root tips that increase the rate of cell division

plant hormone that helps stimulate the ripening of fruit

ethylene plant hormone that helps stimulate the ripening of fruit

any changes in an organism’s environment that cause a response

stimulus any changes in an organism’s environment that cause a response

the response of a plant to gravity

gravitropism the response of a plant to gravity

a plant’s response to the number of hours of darkness in its environment

photoperiodism a plant’s response to the number of hours of darkness in its environment

plant hormones that increase the rate of cell division and cell elongation

gibberellins plant hormones that increase the rate of cell division and cell elongation

the response of a plant to touch

thigmotropism the response of a plant to touch

a response that results in plant growth toward or away from a stimulus

tropism a response that results in plant growth toward or away from a stimulus

plant hormone responsible for phototropism

auxin plant hormone responsible for phototropism

the growth of a plant toward or away from light

phototropism the growth of a plant toward or away from light

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