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Question
Assertion (A): All chordates possess an open circulatory system.
Reason(R): Balanoglossus possesses an open blood vascular system.
Assertion (A): All chordates possess an open circulatory system.
Reason(R): Balanoglossus possesses an open blood vascular system.
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Solution
Correct option: (d) Assertion(A) is false and reason(R) is true.
∙ All chordates possess a closed circulatory system which shows the presence of blood vessels allowing the flow of blood in the body.
∙ Balanoglossus is a hemichordate and comes in the category of invertebrates.
∙ In Balanoglossus, some primitive features are present like an open blood vascular system which means the blood pumped by the heart passes through large vessels into open spaces or body cavities.
∙ So the correct option is (d).
Correct option: (d) Assertion(A) is false and reason(R) is true.
∙ All chordates possess a closed circulatory system which shows the presence of blood vessels allowing the flow of blood in the body.
∙ Balanoglossus is a hemichordate and comes in the category of invertebrates.
∙ In Balanoglossus, some primitive features are present like an open blood vascular system which means the blood pumped by the heart passes through large vessels into open spaces or body cavities.
∙ So the correct option is (d).
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