Zoology Glossary Index:
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A term that refers to a single individual animal in a colony of invertebrates. Multiple zooids are often attached to each other. A group of zooids may function as a single animal.
A group or collection of various species of plankton.
Unicellular yellow-brown algae that live in the gastrodermis of reef-building corals.
In birds, refers to the arrangement of the toes in which the outer front toe faces back and as a result, two toes point forward and two backward.
An egg that has been fertilized.