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New Mexico Tech: The 7 Characteristics of Life
Describes the seven characteristics that define what life is for biological purposes.
BiologyWise
Biology Wise: Comparison of Living and Non Living Things
Compares the characteristics of living and non-living things based on respiration, life processes, response to stimuli, death, and composition.
BBC
Bbc: Nature Wildfacts: Common Earthworm
Before you go looking for an earthworm, learn more about it from this detailed fact sheet and from these close-up photos.