What Do the Results of Research on Gravitropic Responses of Roots

question 44

Multiple Choice

What do the results of research on gravitropic responses of roots and stems show?

• A) Different tissues have the same response to auxin.
• B) The effect of a plant hormone can depend on the tissue.
• C) Some responses of plants require no hormones at all.
• D) Amyloplasts are required for the gravitropic response.
• E) Cytokinin can only function in the presence of auxin.

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