Arthropoda shows the presence of endocrine system . Is their any endocrine system in porifera , cnidaria , plantyhelminthes , nematoda , annelida , mollusca and echinodermata .

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Solution

Except porifera, all the other phylums- cnideria, platyhelminthes, nematoda, annelida, mollusca and echinodermata possess an endocrine system.

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\begin{matrix} A & B & C Bilaterally symmetrical & Bilaterally symmetrical & Bilaterally symmetrical Pseudocoelomate & Open circulatory system & Marine animals Parasitic worms & Reduced coelomic cavity & Notochord \end{matrix}

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

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

The life processes in humans are controlled and regulated by:
A. Reproductive and endocrine systems.

B. Respiratory and nervous systems.

C. Endocrine and digestive systems.

D. Nervous and endocrine systems.

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