Part a - experimental technique: manipulating movement of compounds from the coleoptile tip the hypothesis that a mobile compound produced in the coleoptile tip controlled its bending toward directional light was tested by p. boysen-jensen in 1893. his experimental setup is represented below. both dark and light treatment groups had intact coleoptiles as controls. the experimental groups included: coleoptiles in which the tips were removed coleoptiles that were cut with the tips separated by mica coleoptiles that were cut with the tips separated by agar boysen-jensen left one set of coleoptiles in darkness for 24 hours and one set in directional light for 24 hours and observed whether they elongated and/or bended toward the light.

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Biology

Jakobe Wall

22 March, 19:16

Part a - experimental technique: manipulating movement of compounds from the coleoptile tip the hypothesis that a mobile compound produced in the coleoptile tip controlled its bending toward directional light was tested by p. boysen-jensen in 1893. his experimental setup is represented below. both dark and light treatment groups had intact coleoptiles as controls. the experimental groups included: coleoptiles in which the tips were removed coleoptiles that were cut with the tips separated by mica coleoptiles that were cut with the tips separated by agar boysen-jensen left one set of coleoptiles in darkness for 24 hours and one set in directional light for 24 hours and observed whether they elongated and/or bended toward the light.

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Eloise · Answer 1

The cleoptiles when under treatment it shows a 24-hour dark treatment when the coleoptiles are intact they will be straight and tall, when the tip is removed there will be no growth they will remain straight and short. When micar is inserted there will be no growth at all but when agar is inserted, they are straight and tall.

The coleoptile if put in a directional light treatment, the intact coleoptile will be tall and bent and when the tip is removed, there will be no growth it will only be straight and short. When micar is inserted there will be no growth and when agar is inserted they will be tall and straight.