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Earthworms

Close up of some Earthworms in soil.

Earthworms help break down organic matter into soil and are an important indicator of the health of the soil. They can also be used directly as a ‘tool’ to determine if certain toxins are present, by measuring the timing of their response to a touch.

Rights: The University of Waikato
Published:18 June 2008Size: 251.75 KB