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Write the general character of the subph...

Write the general character of the subphylum vertebrata.

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1.The vertebrates have notochord during embryonic stage. In adult, it is replaced by vertebral column.
2. They have paired appendages.
3. The skin is covered by protective skeleton like scales, feathers, hairs, claws, nails etc.
4. Respiration is by gills, skin, buccopharyngeal cavity and lungs.
5. They have a ventral heart with two, or three or four chambers.
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