Life Story Of The Earthworm

Describes, through detailed photographic study, the life story of the earthworm--in physical characteristics, life processes, and behavioral patterns. Describes the environmental conditions necessary for it’s survival and shows how the earthworm moves, feeds, reproduces, and reacts to stimuli. Demonstrates how earthworms change their environment, the soil which they inhabit, and make the soil more fertile. (Animals without backbones Series)