WebPolymorphism the feature of the population which includes more than one type of structurally and functionally different individuals. For example, in Obelia shows polymorphism, the gastrozooids for feeding and the individuals capable of asexual reproduction only are the gonozooids, the blastostyles and medusae. In the species of … Web6. The proximal end gradually narrows down and a disc appears for attachment. The distal end expands and by developing a manubrium and a circlet of tentacles, it turns to a …
Coelenterates- Metagenesis - SlideShare
WebZoology first year.Polymorphism . Polymorphism in Obelia WebJan 7, 2024 · The colony of obelia is polymorphic because the following three types of zooids 1.Hydranth 2.blastostyle 3.Medusa. 3. Perisarc Perisarc is a non-living chitinous layer that surrounds coenosarc externally. It is tough, transparent and yellowish or … csn insurance las vegas
Obelia - Wikipedia
WebApr 8, 2024 · In this video lecture, the Polymorphism in obelia, its life cycle and the difference between polyp and medusa has discussed in detail 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. There … See more The polyp colony reproduces asexually. During this stage of life, Obelia are confined to substrate surfaces. In mature colonies there are individual hydranths called gastrozooids, which can be found expanded or … See more Through its life cycle, Obelia take on two forms: polyp and medusa. They are diploblastic, with two true tissue layers—an See more • A Hydroid: Obelia Longissima • The Double Life of Obelia See more Estimates of divergence times and distinctive haplotypes provide evidence of glacial refugia around Iceland and southeastern … See more WebAug 26, 2024 · POLYMORPHISM Thus, the life cycle of Obelia includes three distinct types of zooids; a) Nutritive polyps – hydranths b) Asexual reproductive polyps – blastostyles c) … eagle tub transfer bench