Which substance will help in seed germination and indicates to the plant that the stem must elongate to reach the light?
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In our lectures and chapter readings, we learned about the experiments conducted by Frits Went and Charles and Francis Darwin on plant phototropism. Which of the following is a conclusion that both would agree on based on their experiments? Cells on the shaded side of the coleoptile elongate in response to auxin. When shoots are exposed to light, a chemical substance migrates toward the light. Agar contains a chemical substance that mimics plant hormone. A chemical substance involved in shoot bending is produced in shoot tips. If shoot tips have been cut, normal growth cannot be induced.
Madhur L.
In our lectures and chapter readings, we learned about the experiments conducted by Frits Went and Charles and Francis Darwin on plant phototropism. Which of the following is a conclusion that the both would agree based on their experiments? Cells on the shaded side of the coleoptile elongate in response to auxin. When shoots are exposed to light, a chemical substance migrates toward the light. Agar contains a chemical substance that mimics a plant hormone. A chemical substance involved in shoot bending is produced in shoot tips. shoot tips have been cut, normal growth cannot be induced.
Sri K.
What did Went's experiments with the gelatin block demonstrate? A. Plants cannot be induced to bend during growth unless they are exposed to an indirect source of light. B. Light induces the coleoptile to produce a diffusible substance that moves to the growing region of a plant where it stimulates cells to elongate. C. Gelatin can enhance the movement of a soluble factor from the growing region of a plant to the coleoptile where it accelerates growth. D. When a plant tip is removed from a growing plant, the plant acquires the ability to bend toward the light.
John N.
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