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Which of the following class is being correctly described by given statements (i - iv)?
(i) All living members of this class are ectoparasites on some fishes.
(ii) They have a sucking and circular mouth without jaws.
(iii) Circulation is of closed type.
(iv) They are marine but migrate for spawning to fresh water. After spawing, within a few days they die.
- a)Cyclostomata
- b)Chondrichthyes
- c)Osteichthyes
- d)Amphibia
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Which of the following class is being correctly described by given st...
The correct answer is option A) Cyclostomata.
Explanation:
Cyclostomata is a class of jawless fish that includes lampreys and hagfish. Let's look at each statement to understand why it is the correct answer:
(i) All living members of this class are ectoparasites on some fishes.
- Lampreys are ectoparasites that attach themselves to the bodies of other fish and feed on their blood and body fluids.
(ii) They have a sucking and circular mouth without jaws.
- Both lampreys and hagfish have a circular, jawless mouth. They use their mouth to create a suction and feed on the tissues and body fluids of their host fish.
(iii) Circulation is of closed type.
- Cyclostomata have a closed circulatory system, meaning that their blood is contained within vessels and is pumped by a heart. This allows for efficient transport of oxygen and nutrients throughout their bodies.
(iv) They are marine but migrate for spawning to fresh water. After spawning, within a few days they die.
- Lampreys are generally found in marine environments but migrate to freshwater for spawning. After laying eggs, they die within a few days.
In contrast, the other options can be ruled out based on the given statements:
- Chondrichthyes (option B) includes cartilaginous fish like sharks and rays, which do not match the given statements.
- Osteichthyes (option C) includes bony fish, which do not match the given statements.
- Amphibia (option D) includes amphibians like frogs and salamanders, which do not match the given statements.
Therefore, the correct answer is option A) Cyclostomata.
Explanation:
Cyclostomata is a class of jawless fish that includes lampreys and hagfish. Let's look at each statement to understand why it is the correct answer:
(i) All living members of this class are ectoparasites on some fishes.
- Lampreys are ectoparasites that attach themselves to the bodies of other fish and feed on their blood and body fluids.
(ii) They have a sucking and circular mouth without jaws.
- Both lampreys and hagfish have a circular, jawless mouth. They use their mouth to create a suction and feed on the tissues and body fluids of their host fish.
(iii) Circulation is of closed type.
- Cyclostomata have a closed circulatory system, meaning that their blood is contained within vessels and is pumped by a heart. This allows for efficient transport of oxygen and nutrients throughout their bodies.
(iv) They are marine but migrate for spawning to fresh water. After spawning, within a few days they die.
- Lampreys are generally found in marine environments but migrate to freshwater for spawning. After laying eggs, they die within a few days.
In contrast, the other options can be ruled out based on the given statements:
- Chondrichthyes (option B) includes cartilaginous fish like sharks and rays, which do not match the given statements.
- Osteichthyes (option C) includes bony fish, which do not match the given statements.
- Amphibia (option D) includes amphibians like frogs and salamanders, which do not match the given statements.
Therefore, the correct answer is option A) Cyclostomata.
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Which of the following class is being correctly described by given st...
Cyclostomata is a group of chordates that includes the living jawless fishes: the lampreys and hagfishes. The name cyclostomata means "round mouths". Their mouths cannot close due to the lack of a jaw, so they have to constantly cycle water through the mouth.
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Which of the following class is being correctly described by given statements (i - iv)?(i) All living members of this class are ectoparasites on some fishes.(ii) They have a sucking and circular mouth without jaws.(iii) Circulation is of closed type.(iv) They are marine but migrate for spawning to fresh water. After spawing, within a few days they die.a)Cyclostomatab)Chondrichthyesc)Osteichthyesd)AmphibiaCorrect answer is option 'A'. Can you explain this answer?
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Which of the following class is being correctly described by given statements (i - iv)?(i) All living members of this class are ectoparasites on some fishes.(ii) They have a sucking and circular mouth without jaws.(iii) Circulation is of closed type.(iv) They are marine but migrate for spawning to fresh water. After spawing, within a few days they die.a)Cyclostomatab)Chondrichthyesc)Osteichthyesd)AmphibiaCorrect answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following class is being correctly described by given statements (i - iv)?(i) All living members of this class are ectoparasites on some fishes.(ii) They have a sucking and circular mouth without jaws.(iii) Circulation is of closed type.(iv) They are marine but migrate for spawning to fresh water. After spawing, within a few days they die.a)Cyclostomatab)Chondrichthyesc)Osteichthyesd)AmphibiaCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following class is being correctly described by given statements (i - iv)?(i) All living members of this class are ectoparasites on some fishes.(ii) They have a sucking and circular mouth without jaws.(iii) Circulation is of closed type.(iv) They are marine but migrate for spawning to fresh water. After spawing, within a few days they die.a)Cyclostomatab)Chondrichthyesc)Osteichthyesd)AmphibiaCorrect answer is option 'A'. Can you explain this answer?.
Which of the following class is being correctly described by given statements (i - iv)?(i) All living members of this class are ectoparasites on some fishes.(ii) They have a sucking and circular mouth without jaws.(iii) Circulation is of closed type.(iv) They are marine but migrate for spawning to fresh water. After spawing, within a few days they die.a)Cyclostomatab)Chondrichthyesc)Osteichthyesd)AmphibiaCorrect answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following class is being correctly described by given statements (i - iv)?(i) All living members of this class are ectoparasites on some fishes.(ii) They have a sucking and circular mouth without jaws.(iii) Circulation is of closed type.(iv) They are marine but migrate for spawning to fresh water. After spawing, within a few days they die.a)Cyclostomatab)Chondrichthyesc)Osteichthyesd)AmphibiaCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following class is being correctly described by given statements (i - iv)?(i) All living members of this class are ectoparasites on some fishes.(ii) They have a sucking and circular mouth without jaws.(iii) Circulation is of closed type.(iv) They are marine but migrate for spawning to fresh water. After spawing, within a few days they die.a)Cyclostomatab)Chondrichthyesc)Osteichthyesd)AmphibiaCorrect answer is option 'A'. Can you explain this answer?.
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