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Which one of the following animal phyla does not possess a coelom ?
- a)Platyhelminthes
- b)Annelida
- c)Mollusca
- d)Echinodermata
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which one of the following animal phyla does not possess a coelom ?a)P...
Platyhelminthes are acoelomate.
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Which one of the following animal phyla does not possess a coelom ?a)P...
Coelom Overview
A coelom is a fluid-filled body cavity that lies completely within the mesoderm. It allows for greater complexity in body structure and function, including the development of more complex organs and systems.
Phyla Without a Coelom
Among the mentioned animal phyla, only one lacks a true coelom:
Other Phyla with Coelom
The other three phyla listed possess a coelom:
Importance of Coelom
The presence of a coelom allows for:
In summary, Platyhelminthes stands out as the only phylum among the options given that does not have a coelom, highlighting its simpler body organization compared to the other mentioned phyla.
A coelom is a fluid-filled body cavity that lies completely within the mesoderm. It allows for greater complexity in body structure and function, including the development of more complex organs and systems.
Phyla Without a Coelom
Among the mentioned animal phyla, only one lacks a true coelom:
- Platyhelminthes: Commonly known as flatworms, this phylum includes species like planarians, flukes, and tapeworms. They are acoelomate, meaning they do not possess a coelom.
Other Phyla with Coelom
The other three phyla listed possess a coelom:
- Annelida: This phylum includes segmented worms like earthworms and leeches, which have a true coelom that provides space for organ development and movement.
- Mollusca: Mollusks such as snails, clams, and octopuses have a coelom that accommodates their internal organs and allows for more complex body structures.
- Echinodermata: This group includes starfish and sea urchins. They possess a coelom that supports their unique body plan and internal systems.
Importance of Coelom
The presence of a coelom allows for:
- Enhanced organ development and complexity.
- Improved movement and flexibility.
- Better nutrient transport and waste removal systems.
In summary, Platyhelminthes stands out as the only phylum among the options given that does not have a coelom, highlighting its simpler body organization compared to the other mentioned phyla.
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Which one of the following animal phyla does not possess a coelom ?a)Platyhelminthesb)Annelidac)Molluscad)EchinodermataCorrect answer is option 'A'. Can you explain this answer? for 2025 is part of preparation. The Question and answers have been prepared according to the exam syllabus. Information about Which one of the following animal phyla does not possess a coelom ?a)Platyhelminthesb)Annelidac)Molluscad)EchinodermataCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following animal phyla does not possess a coelom ?a)Platyhelminthesb)Annelidac)Molluscad)EchinodermataCorrect answer is option 'A'. Can you explain this answer?.
Which one of the following animal phyla does not possess a coelom ?a)Platyhelminthesb)Annelidac)Molluscad)EchinodermataCorrect answer is option 'A'. Can you explain this answer? for 2025 is part of preparation. The Question and answers have been prepared according to the exam syllabus. Information about Which one of the following animal phyla does not possess a coelom ?a)Platyhelminthesb)Annelidac)Molluscad)EchinodermataCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following animal phyla does not possess a coelom ?a)Platyhelminthesb)Annelidac)Molluscad)EchinodermataCorrect answer is option 'A'. Can you explain this answer?.
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