Question

30. The movement of the earthworm towards the soil is:
a. Negative geotaxis
c. Positive geotaxis
b. Negative geotropism
d. Positive geotropism​

Answer 1

Answer:

When the circular muscles contract, the earthworm stretches, becoming longer and thinner. The earthworm uses its setae to anchor the front of its body in the soil.

Explanation:

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Answer 2

Answer:

The movement of the earthworm towards the soil is positive geotaxis.

Explanation:

Taxis characteristics in organism results from the presence of stimuli such as gravity, chemicals, or light.

Positive taxis are the response of an organism to the stimulus by moving towards it.

Geotaxis refers to the response of any organism to gravity stimuli.

Earthworms can sense the direction of gravity and thus respond with the movement towards the soil resulting in positive geotaxis.