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Is obelia a motile coelenterate?
Obelia is a type of colonial coelenterate, specifically belonging to the class Hydrozoa. It exhibits both motile and sessile forms during its lifecycle; the medusa stage is free-swimming and motile, while the polyp stage is attached to a substrate and sessile. Therefore, while Obelia has a motile phase, it is not entirely motile as a whole organism.
What is the function of the gastrozoid of an obelia?
The gastrozoid of an Obelia functions to capture and digest food for the colony. It is responsible for capturing prey using its tentacles and then passing the nutrients to other zooids within the colony through a shared network.
Which kingdom contains organisms that have a saprophyte and gametophyte stage?
Many algae contain organisms that have a sporophyte and a gametophyte stage. This is called metagenesis of alternation of generations and is a characteristic of Cladophora.
What is metagenesis in coelentrates?
Metagenesis, also known as alternation of generations, is a reproductive phenomenon in cnidarians where individuals alternate between a polyp and medusa form throughout their life cycle. The polyp form is a sessile, cylindrical structure that reproduces asexually, while the medusa form is a free-swimming, bell-shaped structure that reproduces sexually. This alternating life cycle allows for genetic diversity and adaptation to different environmental conditions.
How do polyp and medusae in coelenterates alternate with each other?
Polyp is a asexual form which has a cylindrical body just like hydra whereas the medusa form is sexual form and has an umbrella shape. In case of Aurelia, the adult is sexual form. Males and females are separate and after copulation the female releases eggs which develop into a hydra like structure called ephyra larva which is called polyp form. This larva by budding produces umbrella shaped medusa forms. Thus the asexual polyp form alters with the sexual medusa form. This alternation of generations is called metagenesis.
What are the differences between metagenesis and metamorposis?
Metagenesis is the phenomenon by which the organism exhibits alternation of generation.For eg :cnidarians especially obelia shows metagenesis where the polyp form (sessile and cylindrical structure) produce medusae (free swimming and umbrella shaped structure) asexually and medusae produce polyp sexually. But in metamorphosis, the organism undergoes several stages which are distinct from that of the adults and these distinct structures undergo abrupt changes in their body structures and internal organs to form the matured adult one. eg: frog,butterfly.
Why do you need photos?
hydra obelia
What is the mode of reproduction of medusae?
Medusa is a stage in life cycle of Cnidarians eg. Obelia in which medusae are produced by budding in blastostyl.Medusa possess sex organs i.e. testes and ovaries which produce gametes i.e. sperms and eggs which fuse to form zygote which develops in second stage of life cycle called a Polyp . Possession of two alternating stage in life cycle of Cnidarians is called Metagenesis .
What type of symmetry is obelia?
mostly assemetric
What is the difference between hydra and obelia?
1v1 me irl
What phylum does obelia belong to?
Phylum Cnidaria
How do obelia reproduce?
they just appear magicly whooo mysterious
Is an obelia unicellular or a muticellular organism?
Obelia is a multicellular organism. It belongs to the class Hydrozoa, which consists of colonial organisms made up of individual polyps that are interconnected and function together as a single unit.
Is obelia a motile coelenterate?
Obelia is a type of colonial coelenterate, specifically belonging to the class Hydrozoa. It exhibits both motile and sessile forms during its lifecycle; the medusa stage is free-swimming and motile, while the polyp stage is attached to a substrate and sessile. Therefore, while Obelia has a motile phase, it is not entirely motile as a whole organism.
What is the function of the gastrozoid of an obelia?
The gastrozoid of an Obelia functions to capture and digest food for the colony. It is responsible for capturing prey using its tentacles and then passing the nutrients to other zooids within the colony through a shared network.
What Organisms which typically exhibit a polyp stage and a medusa stage belong to which class of Cnidarians?
Obelia
Which kingdom contains organisms that have a saprophyte and gametophyte stage?
Many algae contain organisms that have a sporophyte and a gametophyte stage. This is called metagenesis of alternation of generations and is a characteristic of Cladophora.
