15 points! write a hypothesis about the effect of a strong odor on earthworm behavior. use the "if . . then . . because . . ” format, and be sure to answer the lesson question, "how is earthworm behavior affected by external stimuli? ”

Earthworms are very sensitive towards the odor.

They use it for locating the food in the soil. Because earthworms are dependent upon microorganism in the soil, they must be sensible for the presence of any food around them if they do not respond the odor then they may die.

Earthworms have the escape response so they quickly respond the external stimuli at the part they are stimulated. With the increasing frequency of stimuli at the same part they slowly decrese the response towards it.