Practice: Movement in Plants

If, when growing, the roots of a bean shoot touch an object (like an underground rock), signals are transmitted to encourage the root to grow away from that object. What tropism is being displayed here?

  • APositive chemotropism
  • BNegative hydrotropism
  • CNegative thigmotropism/haptotropism
  • DNegative phototropism
  • EPositive gravitropism

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