Multiple choice

The planktonic larvae of the king crab (Lithodes aequispinus) use which of the following types of nastic movement while swimming upwards?

  1. Thigmotaxis

  2. Thermotaxis

  3. Rheotaxis

  4. Gravitaxis

  5. Phonotaxis

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

Gravitaxis is a response to the attraction due to gravity. The planktonic larvae of the king crab (Lithodes aequispinus) use a combination of positive phototaxis (movement towards the light) and negative gravitaxis (upward movement).