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  4. Jawless fish probably evolved around

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Q. Jawless fish probably evolved around

NTA AbhyasNTA Abhyas 2020Evolution

Solution:

By the time of 500 mya, invertebrates were formed and active. Jawless fish probably evolved around 350 mya. Sea-weeds and few plants existed probably around 320 mya. Land reptiles went back into the water to evolve into fish-like reptiles probably 200 mya (e.g. Ichthyosaurs).