Question

The animals with the spiny skin belongs to
a) Porifera
b) Annelida
c) Echinodermata
d) All of the above

Answer 1

Hint: The animals having the presence of the skin also have the presence of radial symmetry. These animals are usually marine animals and are found in the water only. They also have a characteristic feature of triploblastic body type.

Complete answer:
The animals having spiny skin are Echinoderms. The term echinoderm can be broken down into echino meaning spiny and derma meaning skin which is spiny skin. The echinoderms are mostly aquatic animals that live in the oceans. They have a radial symmetry present and are also examples of triploblastic animals. The most commonly known example of echinoderm is starfish, sea urchins, and sea lilies. They lack the presence of a distinct head and move by the movement of their arms.

Additional information:
-Porifera have animals which have pores present on their body. They are also mostly found in the marine environment and are radially symmetrical. Their body is usually cylindrical in shape and has a tissue level of organization. They lack any organs. They cannot move and are attached to a substratum. They also lack the presence of a true body cavity.
-Annelida has animals present with a slimy skin layer. They usually breathe through their skin so they have a very thin skin layer. They are bilaterally symmetrical in nature and are triploblastic coelomate animals. They can move around and are found on the soil.

So, the answer is ‘Echinodermata’.

Note: The echinoderms or the phylum Echinodermata have the presence of spiny skinned animals. They usually have bilateral symmetry and also have the presence of a triploblastic layer. They are mostly marine. Starfish is an example of echinoderm.