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Question

Identify me.
a. I am diploblastic & acoelomate. Which phylum do I belong to?
b. My body is radially symmetrical. Water vascular system is present in my body. I am referred as fish though I am not. What is my name?
c. I live in your small intestine. Pseudocoelom is present in my thread like body. In which phylum will you include me?
d. Though I am multicellular, there are no tissues in my body. What is the name of my phylum?

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Solution

a. I belong to the phylum Cnidaria- Diploblastic animals have two cell layers to their bodies, outer ectoderm, and inner endoderm. The phylum Cnidaria contains diploblastic animals. Acoelomate animals have no true body cavity such as Porifera, Cnidaria, Ctenophora, Platyhelminthes, Mesozoa, Nemertina, Gnathostomulida.

b. I belong to the phylum Echinodermata and my name is Starfish/Asterias- The water vascular system is a characteristic feature of all echinoderms. It includes a system of canals within the body in which the seawater circulates.
c. You belong to the phylum Aschelminthes and your name is Ascaris-The body cavity of phylum Aschelminthes is called pseudocoloem. It is filled with pseudocoelomic fluid. The body cavity is not lined by the mesodermal layer.
d. The name of the phylum is Porifera.-Animals of the phylum Porifera have an asymmetrical body with the cellular level of body organization.


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