Articles on
Invertebrates
(50)
Abalone
Abalone (Haliotis), genus of primitive marine gastropod MOLLUSCS with over 70 species worldwide. There are 2 species in Canada. The pinto abalone (Haliotis kamtschatkana) also known as the Japanese or northern...
Annelida
Annelida is a phylum of segmented worms with a true body cavity (coelom) separating gut from body wall. Annelids probably evolved from unsegmented coelomates which became segmented to allow continuous, active...
Arachnida
Arachnida is a large class of chelicerate arthropods (segmented, jointed-limbed animals) including the orders Araneae (SPIDERS), Scorpiones (SCORPIONS), Opiliones (HARVESTMEN), Pseudoscorpiones (PSEUDOSCORPIONS),...
Bacteria
Bacteria are microscopic single-celled organisms capable of rapid growth and division. As prokaryotes [Gk, "before nucleus"], bacteria are characterized by the organization of deoxyribonucleic acid...
Barnacle
Barnacle, common name for marine INVERTEBRATES of subclass Cirripedia, class Crustacea. Barnacles, the only sessile CRUSTACEANS, have adopted an odd lifestyle: they stand on their heads and kick food into their...
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