WebObelia Definition of Obelia. Obelia refers to the sedentary, marine colonial form which has an attachment on the surface of... Structure of Obelia. Obelia throughout its life cycle takes two forms: polyp and medusa. The first form is diploblastic,... Life Cycle of Obelia. The polyp … WebV Figure 33.8 The life cycle of the hydrozoan Obelia. The polyp is asexual, and the medusa is sexual, releasing eggs and sperm. These two stages alternate, one producing the other. O other polyps, specialized for reproduction, lack tentacles and produce tiny medusae by …
Answered: V Figure 33.8 The life cycle of the… bartleby
WebObelia has a more complex life cycle. This species has two very different stages in its life: a colonial polyp and a medusa (other cnidarians may have only the medusa or only the polyp stage). The colonial polyp stage, shown here is called a hydroid. It consists of multiple genetically identical polyps joined together by continuous tissues. 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 epidermis (ectodermis) and a gastrodermis (endodermis)—with a jelly-like mesoglea filling the area between the two true tissue … 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 Canada. In one study, O. geniculata was first documented in these areas in the 1990s but were later found in Massachusetts and … See more birch centerpieces
What structures determine whether a polyp of obelia is a Hydranth …
WebIn the phylum Cnidaria, which includes jellyfish and sea anemones, polyp and medusa are two different stages of the life cycle. In some species, these two stages alternate between each other, such as in Hydrozoa. Jellyfish, on the other hand, exhibit only the medusa … WebNov 16, 2024 · Answer: Although there are differences between polyp and medusa, still they are strictly homologous as they are formed in the same fundamental pattern.Homology and similarity in the structure of polyp and medusa can also be explained by the fact that one can easily be derived from the other.. E.g. when a polyp is inverted, its tentacles and … WebObelia flabellata (Hincks, 1866) Obelia plana Haeckel, 1879. Obelia longissima is a colonial species of hydrozoan in the order Leptomedusae. Its hydroid form grows as feathery stems resembling seaweed from a basal … birch centre camhs