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NTA Abhyas NEET2020BotanyAnimal KingdomPractice

The typical body plan of a chordate is given in the following diagram. Given labellings A and B, respectively, are:

Options

  1. ANerve cord and notochord
  2. BNerve cord and myotomes
  3. CNotochord and vertebral column
  4. DNotochord and nerve cord

Correct answer

A. Nerve cord and notochord

Step-by-step 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.

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