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Q.
The typical body plan of a chordate is given in the following diagram. Given labellings A and B, respectively, are:
NTA AbhyasNTA Abhyas 2020Animal Kingdom
Solution:
Members of Chordata possess 3 fundamental characters at any stage of life:
$1.$ Notochord - Solid, mesodermal and later on develop into vertebral column.
$2.$ Dorsal hollow nerve cord (or dorsal tubular nerve cord or neural tube)
$3.$ Pharyngeal gill slits.
Post anal tail may or may not be present.
