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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Excretory organs are absent in phylum Platyhelminthes.
Reason : Flame cells are the respiratory organs of Platyhelminthes.
  • a)
    Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).
  • b)
    Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).
  • c)
    Assertion (A) is true but reason (R) is false.
  • d)
    Assertion (A) is false but reason (R) is true.
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Directions : In the following questions a statement of Assertion (A) ...
Flame cells are the excretory organs of Platyhelminthes and other related animals which possess flickering cilia or flagella for driving the excretory products.
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Most Upvoted Answer
Directions : In the following questions a statement of Assertion (A) ...
• Assertion: Excretory organs are absent in phylum Platyhelminthes.
• Reason: Flame cells are the excretory organs of Platyhelminthes.

The correct answer is option D, i.e., "Assertion (A) is false but reason (R) is true."

Explanation:

• Platyhelminthes is a phylum of flatworms that are bilaterally symmetrical and acoelomate.
• These organisms possess a primitive excretory system that is composed of flame cells, also known as protonephridia.
• Flame cells are specialized cells that are responsible for osmoregulation and excretion of metabolic wastes.
• These cells possess cilia that beat in coordination to create a water current, which helps in the elimination of waste materials from the body.
• However, flame cells are not considered true excretory organs since they do not have a duct system to transport the waste products outside the body.
• Therefore, the assertion that excretory organs are absent in phylum Platyhelminthes is false, but the reason that flame cells are the excretory organs of Platyhelminthes is true.
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Community Answer
Directions : In the following questions a statement of Assertion (A) ...
In platyhelminthes excretory organ is flame cell for osmoregulation and excretion but according to question flame cell is respiratory organ and excretory organ is absent
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : Excretory organs are absent in phylum Platyhelminthes.Reason : Flame cells are the respiratory organs of Platyhelminthes.a)Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).b)Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'D'. Can you explain this answer?
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : Excretory organs are absent in phylum Platyhelminthes.Reason : Flame cells are the respiratory organs of Platyhelminthes.a)Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).b)Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'D'. 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 Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : Excretory organs are absent in phylum Platyhelminthes.Reason : Flame cells are the respiratory organs of Platyhelminthes.a)Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).b)Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion : Excretory organs are absent in phylum Platyhelminthes.Reason : Flame cells are the respiratory organs of Platyhelminthes.a)Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).b)Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'D'. Can you explain this answer?.
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