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immunity

(Encyclopedia) immunity, ability of an organism to resist disease by identifying and destroying foreign substances or organisms. Although all animals have some immune capabilities, little is known…

Annelida

(Encyclopedia) CE5 A. The earthworm, Lumbricus terrestris, representative of the phylum Annelida. B. Internal anatomy of an earthworm. AnnelidaAnnelidaənĕlˈĭdə [key] [Lat., anellus=a ring],…