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A plant is observed to have deep roots and tendrils that wrap around objects. Which pair of tropism correctly describe these responses?

a. phototropism and thigmotropism
b. hydrotropism and thigmotropism
c. hydrotropism and geotropism
d. geotropism and phototropism

1 answer

The correct pair of tropism that describes deep roots and tendrils wrapping around objects is:

b. hydrotropism and thigmotropism

  • Hydrotropism refers to a plant's growth response to water, which is evident in roots growing towards moisture.
  • Thigmotropism is the growth response to touch or physical contact, which is observed when tendrils wrap around objects for support.

So, the combination of deep roots (hydrotropism) and tendrils that wrap around objects (thigmotropism) accurately describes the observed plant responses.