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A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is: [2015 RS]
- a)myxine
- b)Neomyxine
- c)Petromyzon
- d)Eptatretus
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A jawless fish, which lays eggs in fresh water and whose ammocoetes la...
(c) Petrormyzon marinus, commonly known as sea lamprey lays eggs in fresh water and its larvae after metamorphosis return to the ocean (saline water).
Most Upvoted Answer
A jawless fish, which lays eggs in fresh water and whose ammocoetes la...
The correct answer is option 'C' - Petromyzon.
Explanation:
Jawless fish, also known as agnathans, are a group of fish that lack true jaws. They are primitive vertebrates and include two major groups: lampreys and hagfish.
1. Lampreys:
Lampreys belong to the order Petromyzontiformes. They are jawless fish that lay their eggs in freshwater. After hatching, their larvae, known as ammocoetes, live in freshwater streams or rivers, burrowing into the sediment and filter-feeding on organic matter. These ammocoetes undergo metamorphosis and transform into parasitic adults that migrate to the ocean. In the ocean, they attach themselves to other fish using their sucker-like mouth and feed on their blood and tissues.
2. Hagfish:
Hagfish belong to the class Myxini. They are also jawless fish but have different life cycles compared to lampreys. Hagfish do not undergo metamorphosis and remain in a larval-like state throughout their lives. They do not have a true larval stage like lampreys. Hagfish do not lay their eggs in freshwater but release them directly into the ocean. The eggs are fertilized externally, and the resulting larvae develop in the ocean.
Based on the given options, the correct answer is option 'C' - Petromyzon, which represents lampreys. Lampreys lay their eggs in freshwater and their ammocoetes larvae return to the ocean after metamorphosis.
In summary, the jawless fish that lays eggs in freshwater and whose ammocoetes larvae return to the ocean is the lamprey, represented by option 'C' - Petromyzon.
Explanation:
Jawless fish, also known as agnathans, are a group of fish that lack true jaws. They are primitive vertebrates and include two major groups: lampreys and hagfish.
1. Lampreys:
Lampreys belong to the order Petromyzontiformes. They are jawless fish that lay their eggs in freshwater. After hatching, their larvae, known as ammocoetes, live in freshwater streams or rivers, burrowing into the sediment and filter-feeding on organic matter. These ammocoetes undergo metamorphosis and transform into parasitic adults that migrate to the ocean. In the ocean, they attach themselves to other fish using their sucker-like mouth and feed on their blood and tissues.
2. Hagfish:
Hagfish belong to the class Myxini. They are also jawless fish but have different life cycles compared to lampreys. Hagfish do not undergo metamorphosis and remain in a larval-like state throughout their lives. They do not have a true larval stage like lampreys. Hagfish do not lay their eggs in freshwater but release them directly into the ocean. The eggs are fertilized externally, and the resulting larvae develop in the ocean.
Based on the given options, the correct answer is option 'C' - Petromyzon, which represents lampreys. Lampreys lay their eggs in freshwater and their ammocoetes larvae return to the ocean after metamorphosis.
In summary, the jawless fish that lays eggs in freshwater and whose ammocoetes larvae return to the ocean is the lamprey, represented by option 'C' - Petromyzon.
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A jawless fish, which lays eggs in fresh water and whose ammocoetes la...
Petromyzine blongs to cyclostomata... refer ncert class 11 pg 56
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A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is: [2015 RS]a)myxineb)Neomyxinec)Petromyzond)EptatretusCorrect answer is option 'C'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is: [2015 RS]a)myxineb)Neomyxinec)Petromyzond)EptatretusCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is: [2015 RS]a)myxineb)Neomyxinec)Petromyzond)EptatretusCorrect answer is option 'C'. Can you explain this answer?.
A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is: [2015 RS]a)myxineb)Neomyxinec)Petromyzond)EptatretusCorrect answer is option 'C'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is: [2015 RS]a)myxineb)Neomyxinec)Petromyzond)EptatretusCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is: [2015 RS]a)myxineb)Neomyxinec)Petromyzond)EptatretusCorrect answer is option 'C'. Can you explain this answer?.
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