Differbetween
Obelia refers to a genus of sedentary colonial coelenterates with upright branching stems bearing minute cups in which the polyps sit while jellyfish refers to a free-swimming marine coelenterate with a gelatinous bell- or saucer-shaped body that is typically transparent and has stinging tentacles around the edge.
- What are the differences between Hydra and obelia?
- In what form does obelia exist?
- Is Jelly a medusa or polyp?
- What is the scientific name of obelia?
- What are the similarities and differences between cnidarians and Ctenophores?
- Are hydras immortal?
- Is obelia a plant or an animal?
- Why is Scyphozoan Medusa called jellyfish?
- What is polymorphism in obelia?
- Is Coral a polyp or medusa?
- Is Hydra a polyp or medusa?
- Can Vegans eat jellyfish?
What are the differences between Hydra and obelia?
Hydra is a solitary species and lives attached to substrates, whereas Obelia is a colonial species and lives as polyps in an interconnected branching network. ... Hydra does not have medusa form in their life cycle, whereas Obelia has both forms; polyp and medusa. • Unlike Obelia, Hydra has great regenerative powers.
In what form does obelia exist?
Answer: Through its life cycle, Obelia take 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 layers. They carry a nerve net with no brain or ganglia.
Is Jelly a medusa or polyp?
In general, the jellyfish-shaped medusae are produced asexually by the polyp, whereas sperm and eggs are produced by the medusae. Compare medusa. Cnidarians have two body forms—polyp and medusa—which often occur within the life cycle of a single cnidarian.
What is the scientific name of obelia?
Binomial name. Obelia longissima. (Pallas, 1766) Synonyms. Campanularia flabellata Hincks, 1866.
What are the similarities and differences between cnidarians and Ctenophores?
Both cnidarians and ctenophores are diploblastic animals. Cnidarians exhibit radial symmetry whereas ctenophores exhibit biradial symmetry. Both contain tentacles, surrounding their mouth. The main difference between cnidarians and ctenophores is their body symmetry.
Are hydras immortal?
Hydras are a genus of the Cnidaria phylum. ... All hydra cells continually divide. It has been suggested that hydras do not undergo senescence, and, as such, are biologically immortal.
Is obelia a plant or an animal?
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. Obelia is also called sea fur.
Why is Scyphozoan Medusa called jellyfish?
The Scyphozoa are an exclusively marine class of the phylum Cnidaria, referred to as the true jellyfish (or "true jellies"). ... The class name Scyphozoa comes from the Greek word skyphos (σκύφος), denoting a kind of drinking cup and alluding to the cup shape of the organism.
What is polymorphism in obelia?
The phenomenon of occurrence of an individual in two or more distinct morphological and functional forms. It occurs in the same species of an individual. Each individual member of Coelenterates is known as Zooid and they often units to form a colony which acts as a single unit (individual). ...
Is Coral a polyp or medusa?
Classes. In the class Anthozoa, comprising the sea anemones and corals, the individual is always a polyp; in the class Hydrozoa, however, the individual may be either a polyp or a medusa, with most species undergoing a life cycle with both a polyp stage and a medusa stage.
Is Hydra a polyp or medusa?
Hydra exists in both forms: Polyp and Medusa. These forms are dependent upon nutritional content of the living environment. Medusa is the adult and sexual form whereas Polyp is juvenile and asexual form. Under harsh living conditions and starvation, hydra reproduces sexually.
Can Vegans eat jellyfish?
No, vegans can't eat jellyfish because they are animals. Veganism refuses to consume any animal. But since jellyfish don't have a brain or heart unlike any other animals, several people consider them to be plant as they are unable to feel pain.
