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All coelenterates are aquatic, mostly marine. The bodyform is radially symmetrical, diploblastic and does not have a coelom. The body has a single opening, the hypostome, surrounded by sensory tentacles equipped with either nematocysts or colloblasts to capture mostly planktonic prey.
- Are coelenterates bilaterally symmetrical?
- Are coelenterates segmented?
- What kind of symmetry is seen in coelenterates and cnidarians?
- Are cnidarians symmetrical or asymmetrical?
- Do coelenterates have radial symmetry?
- What are tentacles in coelenterates?
- How do Coelenterates and platyhelminthes differ from each other?
- Which of these are found in Coelenterates?
- Is Coelenterata an Acoelomate?
- How do coelenterates reproduce?
- Are Cnidaria bilateral symmetry?
- What kind of symmetry do Cnidaria have?
- What is symmetry in cnidarians?
- Are Cnidaria asymmetrical?
Are coelenterates bilaterally symmetrical?
Reason : Coelenterates are bilaterally symmetrical. ... Coelenterata is the phylum of acoelomate and radially symmetrical lower invertebrates. Due to their radial body symmetry they are also known as radiata. Bilateral symmetry starts from the phylum platyhelminthes.
Are coelenterates segmented?
> Option C- Coelenterata: Most of the coelenterates are aquatic. They are diploblastic, radially symmetrical and lack coelom. ... They have radial symmetry and are unsegmented.
What kind of symmetry is seen in coelenterates and cnidarians?
Cnidarians are radially symmetrical (i.e., similar parts are arranged symmetrically around a central axis).
Are cnidarians symmetrical or asymmetrical?
Based on both the polyp and medusa body plans, cnidarians are classified as having radial symmetry. All cnidarians have a central point or axis, and if you divide a cnidarian through this central axis, you'll end up with equal parts on either side.
Do coelenterates have radial symmetry?
All coelenterates are aquatic, mostly marine. The bodyform is radially symmetrical, diploblastic and does not have a coelom.
What are tentacles in coelenterates?
Tentacles have special structures known as the nematocysts which help in capturing and paralyzing prey. Coelenterates simply wave their tentacles and when a prey comes in contact, the nematocysts inject the toxin that paralyses or kills the prey. Nematocysts are the most distinguishing feature of this phylum.
How do Coelenterates and platyhelminthes differ from each other?
The key difference between Coelenterata and Platyhelminthes is based on the germ layers of the organism. Coelenterates are diploblastic invertebrates whereas Platyhelminthes are triploblastic invertebrates.
Which of these are found in Coelenterates?
Coelenterates are called Cnidarians because they contain specialized cells called cnidoblasts. They possess stinging structures called nematocysts.
Is Coelenterata an Acoelomate?
Coelenterates are acoelomate animals. These organisms have a blind body sac plan. A non-cellular layer of mesoglea is present. ... The function of an intestine in Coelenterates is played by an internal hollow cavity called coelenteron, located inside the body.
How do coelenterates reproduce?
In Coelenterates reproduction occurs both by asexual as well as sexual methods. Asexual reproduction: They reproduce asexually by the formation of buds on its surface. Afterward, it separates from the parent and grows into a new individual.
Are Cnidaria bilateral symmetry?
The secondary radial symmetry of Cnidaria evidently is a result of the adaptation to the sessile mode of life. The presence of both the marginal and labial rings of tentacles is supposed to be a plesiomorphic character of Cnidaria. In some groups of cnidarians, one of the tentacle rings may be reduced.
What kind of symmetry do Cnidaria have?
Radial symmetry (sort of)
Another important characteristic of some cnidarians is that they have bodies with nearly radial symmetry.
What is symmetry in cnidarians?
Cnidarians have radial symmetry and true tissues.
Are Cnidaria asymmetrical?
Are cnidarians asymmetrical? Cnidarians in both groups have an external radial symmetry, yet internal asymmetries and bilaterality are displayed in many groups.
