What Do the Results of Research on Gravitropic Responses of Roots

Question

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) Light is required for the gravitropic response.
E) Cytokinin can only function in the presence of auxin.

Accepted Answer

The results of research on gravitropic responses of roots and stems show that the effect of a plant hormone can depend on the tissue. Different tissues can have different responses to auxin. This suggests that the hormone is involved in the response, but that other factors may also be important. Other responses of plants do not require hormones, and light is not required for the gravitropic response. Cytokinin can function independently of auxin.