Question 7
In which group of animals, coelom is filled with blood?

(a) Arthropoda
(b) Annelida
(c) Nematoda
(d) Echinodermata

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Solution

(a) Arthropoda

Arthropodas have open circulatory system and so blood does not flow in defined blood vessels. Hence the coelomic cavity is filled with blood.

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Question 28
Hard calcium carbonate structures are used as skeleton by

(a) Echinodermata
(b) Protochordata
(c) Arthropoda
(d) Nematoda

In which group of animals is the coelom filled with blood?

Which group of animals have blood-filled coelom?

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