WebObelia bidentata. Obelia longissima. Obelia is a genus of hydrozoans, a class of mainly marine and some freshwater animal species that have both polyp and medusa stages in their life cycle. Hydrozoa belongs to the phylum Cnidaria, which are aquatic (mainly marine) organisms that are relatively simple in structure with a diameter around 1mm. [1] WebOBELIA-begins as immobile polyp colonies that contain digestive hydranth and reproductive gonangium units.-the gonangium reproduce asexually, releasing medusa by budding.-the medusa, or jellyfish, swim freely and reproduce sexually, releasing eggs and sperm into the water

What structures determine whether a polyp of obelia is a …

WebSelect all of the statements that correctly distinguish these two concepts in the Cnidaria Check All That Apply Members of the class Hydrozoa probably best represent the concept of polymorphism, for example, the presence of gonangium and hydranth forms in the polyp of Obella Members of the class Scyphozoa represent the concept of polymorphism, … WebGonangium: The gonangium (Gr., gonos = seed; angeion = vessel) (Fig. 32.3) is club-shaped, cylindrical form. It is covered by a transparent gonotheca and contains an axis or blastostyle on which lateral buds form that develop into medusae or gonophores. The blastostyle has no mouth and no tentacles, but ends distally into a flattened disc. kaylabob inc rockford il

Gonangium Definition & Meaning - Merriam-Webster

Webgonangium. [ goh- nan-jee- uhm ] noun, plural go·nan·gi·a [goh-nan-jee-uh], go·nan·gi·ums. a reproductive polyp of a colonial hydroid, giving rise asexually to … Webridges and which very nearly cover the entire hydranth when it is fdly retracted; perisarc annulatecl at the bases of the branches and branchlets. ... and so is not a gonangium according to Allman. This author states that a gonanginm is developed about a blastostyle. His definition of the Calyptoblastea is, ... WebWhat is the function of the Hydranth? the terminal part of a hydroid polyp that bears the mouth and tentacles and contains the stomach region. Do Gonangium have tentacles? … lazarus of bethany tomb