Multiple choice

The movements that occur in response to touch are known as

  1. geotropism

  2. hydrotropism

  3. plagiotropism

  4. thigmotropism

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Thigmotropism (from Greek 'thigma' meaning touch) is the directional growth movement in response to physical contact or touch. The classic example is the coiling of tendrils around supports. Geotropism is gravity response, hydrotropism is water response, and plagiotropism is growth at an oblique angle to gravity.