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Question : Assertion: sinus venosus is a thin-walled sac with little muscular tissue in primitive heart. Reason: It receives venous blood through the hapatic veins.

Answer»

If both ASSERTION and Reason are true and the Reason is the correct EXPLANATION of the assertion.
If both assertion and Reason are true but the reason is not the correct explanation of the assertion
If assertion is true but reason is false
If both assertion and reason are false.

Solution :Sinus venosus is found in primitive VERTEBRATES.


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