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Phylum Platyhelminthes - Practice Questions & MCQ
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
Quick Facts
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Phylum Platyhelminthes is considered one of the most asked concept.
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12 Questions around this concept.
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Which one of the following kinds of animals are triploblastic?
One example of animals having a single opening to the outside that serves both as mouth as well as anus is:
Concepts Covered - 1
Phylum Platyhelminthes
- Platyhelminthes are also called flat-worms because the cross-section of the body is flat
- The body is dorsoventrally flattened
- This phylum consists of planaria, flukes and tapeworms
- These are first to exhibit triploblastic phenomenon, i.e., the embryo shows the arrangement of three germ layers as ectoderm, mesoderm and endoderm
- These are acoelomate. The space between ectoderm and endoderm is filled with mesodermal tissue called parenchyma
- They show bilateral symmetry. They are the first animals to show a degree of cephalization
- They show organ level of body organization
- They are mostly parasitic. Some free-living forms are aquatic
- They have an unsegmented body
- Tapeworms (Taenia), Liver fluke (Fasciola) are the examples
- Tapeworms show pseudo segmentation
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