Question

explain the basic grouping of organism into chordata and non chordata​

Answer 1

Animals which have a backbone are grouped together under Chordata. And rest are grouped together under nonchordata.

Answer 2

The organisms of kingdom animaliais divided into chordata and non chordata based on the presence of notochords,so chordates are the organisms which have notochords while non notochordes are the organisms which don't have notochords