Assertion: Many advanced invertebrates have an open circulatory system.

Reason: The open circulatory system is open to the environment.

If both assertion and reason are true and the reason is the correct explanation of assertion.

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If both assertion and reason are false

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If an assertion is true but the reason is false

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If both assertion and reason are true then the reason is not the correct explanation of assertion

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Solution

The correct option is A If both assertion and reason are true and the reason is the correct explanation of assertion.
Correct option: (a) If both assertion and reason are true and the reason is the correct explanation of assertion.

In an open circulatory system, the blood is circulated throughout the body without any arteries or veins.

The tissues directly get in contact with blood by the means of haemolymph.

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Similar questions

Q. Assertion :Closed circulatory system is less efficient than open circulatory system. Reason: The blood flow is slow in closed circulatory system than in open circulatory system.

Annelida have closed circulatory system, while Anthropoda and Mollusca have open blood circulatory system. Although, closed circulatory system is considered more advanced than open blood circulatory system, then why is Anthropoda and Mollusca grouped after Annelida?

Assertion (A): All chordates possess an open circulatory system.
Reason(R): Balanoglossus possesses an open blood vascular system.

Humans have an open circulatory system.

Q. Some fishes have an open circulatory system.

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Assertion: Many advanced invertebrates have an open circulatory system.​ Reason: The open circulatory system is open to the environment.​

Assertion: Many advanced invertebrates have an open circulatory system.

Reason: The open circulatory system is open to the environment.