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NTA AbhyasNTA Abhyas 2020Animal Kingdom
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Solution:
Platyhelminthes have a dorso-ventrally flattened body, hence are called flatworms . These are mostly endoparasites found in animals including human beings. Flatworms are bilaterally symmetrical, triploblastic and acoelomate animals with organ level of organisation. Planaria belongs to the class Turbellaria is a free living organism.