................... possess notochord, ............... do not possess notochord.
A
Vertebrates, invertebrates
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B
Invertebrates, vertebrates
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C
Notochords, chordates
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D
None of the above
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Solution
The correct option is A Vertebrates, invertebrates The animals who posses a proper notochord are known as vertebrates whereas the organisms who do not have a proper notochord are known as invertebrates.