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Investigation of Animal Behaviour An experiment was carried out to determine whether a particular animal prefers a dry soil environment to a wet soil environment. The animal used in this case was an annelid, Lumbricus, L.terrestris, commonly know as the earthworm. They usually habitat a moist soil environment and are nocturnal. Although they have no prominent sense organs, earthworms are sensitive to light, touch, vibration, and chemicals. There is a primitive brain) at the anterior end of the earthworm. Hypothesis I think that most of the worms will favour the wet soil and stay on that side of the container. My hypothesis is based on observations of earthworms coming to the surface on rainy days. Method A Shallow plastic box measuring 25cm x 30cm with a plastic separator down the centre was used to contain the soil samples. The same sample of soil was used but additional tap water was added to make the wet sample....

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