In the gravitropism experiment, the mustard seedling roots grew ____ after being rotated 180 degrees for 24 hours.
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Step 1: Gravitropism is the growth of a plant in response to gravity. Show more…
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Students were investigating the effect of auxin (IAA) on oat coleoptiles grown in the dark. They removed the tips of the oat coleoptiles and placed agar blocks containing various concentrations of auxin on the right side of the coleoptile's ends as shown in the figure. Auxin Concentration 0 mg/L 0.01 mg/L 0.1 mg/L 1.0 mg/L 10 mg/L Tip removed Tip removed Tip removed Tip removed Tip removed After a period of time, you expect most of these coleoptiles to: Select one: A. remain straight because the cells on the right and on the left will expand equally B. bend to the right because the cells on the right will expand most C. bend to the right because the cells on the left will expand most D. bend to the left because the cells on the right will expand most E. bend to the left because the cells on the left will expand
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Gravitropism As plants grow, they tend to align their stems and roots along the direction of the gravitational field. This tendency, which is related to differential concentrations of plant hormones known as auxins, is referred to as gravitropism. As an illustration of gravitropism, experiments show that seedlings placed in pots on the rim of a rotating turntable do not grow in the vertical direction. Do you expect their stems to tilt inward - toward the axis of rotation - or outward - away from the axis of rotation? a. inward b. outward
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If a plant is re-oriented, in which direction will its roots grow? Why does this happen?
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