obelia
aj hm ap ko coelenerata kai animal obelia kai colony kai baare mai btayege
the term zooid is used for an individual form a coelenterate colony hydroid colony of obelia is dimorphic exhibiting two type of zoids 1 polyp or hydranths or feeding 300 idand 2 gonangium
these two type of zooid differ both form morpholgically as well as physiologically
zooids gr zoon=animal oid=form
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