The animals of a certain phylum possess these characteristics:
1. Triploblastic
2. Bilaterally symmetrical
3. True coelom present
4. Segmented body
Identify the correct phylum.

Porifera

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Annelida

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Platyhelminthes

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Nematoda

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Solution

The correct option is D Annelida
Out of all the four options, animals of phylum Annelida show all the four mentioned characteristics. Annelids are triploblastic (have three germ layers) and bilaterally symmetrical (the body can be divided into two equal haves only through the midline). They possess a true coelom (fluid-filled body cavity) and their body is segmented (body is divided into segments).
Some examples of annelids are earthworm, leech, etc.
So, the correct answer is option B.

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