Which of the following groups of animals have closed circulatory system?
A
Cockroach, Locust, Molluscs
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B
Non-cephalopod molluscs, Cockroach
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C
Cephalopod molluscs and Earthworm
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D
Hemichordates and Non-cephalopd molluscs
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Solution
The correct option is C Cephalopod molluscs and Earthworm Closed circulatory system has blood closed in all vessels within vessels of different sizes. In this type, the blood is pumped through vessels by heart. This type of circulatory system is more structured and controlled.
So, the correct option is 'Cephalopod molluscs and earthworm'.