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Growth Responses

Across
In plants, directional response to light
In plants, directional growth response to gravity
Refers to an organism's response to changes in the length of day relative to night
Stimulation of flowering in spring by prolonged exposure to lower temperature in winter
Stuffed with dense grains of starch, sink to lowest region of the cell
In plants, directional growth response to an environmental stimulus
Down
Plants contact (touch) with an object may cause a change in the direction of its growth
A cycle of biological activity that repeats every twenty-four hours or so is called a _________ rhythm