பயனர்:Sivakumar/மணல்தொட்டி/Theme
An invertebrate is an animal lacking a vertebral column. The group includes 97% of all animal species — all animals except those in the subphylum Vertebrata.
An invertebrate is an animal lacking a vertebral column. The group includes 97% of all animal species — all animals except those in the subphylum Vertebrata.
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