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Which group of chordates possesses sucking and circular mouth without jaws?
- a)ClassChondrichthyes
- b)Class Cyclostomata
- c)Class Osteichthyes
- d)Both (b) and (c)
Correct answer is option 'B'. Can you explain this answer?
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Which group of chordates possesses sucking and circular mouth without ...
Class-Cyclostomata is comprised of, the living jawless fishes. Their mouth is circular and lack jaws, hence they are also called agnathans. It is surrounded by tentacles (e.g., lampreys and hellish). These also presses retractable teeth.
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Which group of chordates possesses sucking and circular mouth without ...
Cyclostomata
Cyclostomata is a group of jawless chordates that possess a sucking and circular mouth without jaws. They belong to the superclass Agnatha, which means "no jaws" in Greek. Cyclostomata includes two classes of organisms: Myxini (hagfish) and Petromyzontida (lampreys).
Characteristics of Cyclostomata:
1. Jawless: Cyclostomata lacks true jaws, instead, they have a circular sucking mouth that allows them to feed on the body fluids of other organisms.
2. Cartilaginous skeleton: They have a cartilaginous skeleton that is lighter and more flexible than the bony skeleton of other chordates.
3. Lack paired fins: Cyclostomata lacks paired fins, which are present in other classes of chordates.
4. No scales: They do not have scales like other fish.
5. Single nostril: Cyclostomata has a single nostril that is used for both breathing and smelling.
6. Marine and freshwater: They are found in both marine and freshwater habitats.
7. Parasitic: Most species of Cyclostomata are parasitic, feeding on the blood and body fluids of other organisms. However, some species are detritivores, feeding on decaying organic matter.
Conclusion:
Cyclostomata is a unique and diverse group of jawless chordates that possess a sucking and circular mouth without jaws. They are characterized by their cartilaginous skeleton, lack of paired fins, and parasitic feeding habits.
Cyclostomata is a group of jawless chordates that possess a sucking and circular mouth without jaws. They belong to the superclass Agnatha, which means "no jaws" in Greek. Cyclostomata includes two classes of organisms: Myxini (hagfish) and Petromyzontida (lampreys).
Characteristics of Cyclostomata:
1. Jawless: Cyclostomata lacks true jaws, instead, they have a circular sucking mouth that allows them to feed on the body fluids of other organisms.
2. Cartilaginous skeleton: They have a cartilaginous skeleton that is lighter and more flexible than the bony skeleton of other chordates.
3. Lack paired fins: Cyclostomata lacks paired fins, which are present in other classes of chordates.
4. No scales: They do not have scales like other fish.
5. Single nostril: Cyclostomata has a single nostril that is used for both breathing and smelling.
6. Marine and freshwater: They are found in both marine and freshwater habitats.
7. Parasitic: Most species of Cyclostomata are parasitic, feeding on the blood and body fluids of other organisms. However, some species are detritivores, feeding on decaying organic matter.
Conclusion:
Cyclostomata is a unique and diverse group of jawless chordates that possess a sucking and circular mouth without jaws. They are characterized by their cartilaginous skeleton, lack of paired fins, and parasitic feeding habits.
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Which group of chordates possesses sucking and circular mouth without ...
Class-Cyclostomata is comprised of, the living jawless fishes. Their mouth is circular and lack jaws, hence they are also called agnathans. It is surrounded by tentacles (e.g., lampreys and hellish). These also presses retractable teeth.
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Which group of chordates possesses sucking and circular mouth without jaws?a)ClassChondrichthyesb)Class Cyclostomatac)Class Osteichthyesd)Both (b) and (c)Correct answer is option 'B'. Can you explain this answer?
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