What is the group of the phylum chordata, Biology

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What is the group of the phylum Chordata that first colonized the terrestrial environment? From which habitat did they come?

Amphibians, partially aquatic partially terrestrial animals, were the first chordates that colonized the dry land. They came from the aquatic habitat and were created from fishes. (however the first completely terrestrial chordates were the reptiles).

 


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