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NTA Abhyas NEET2020BotanyAnimal KingdomPractice

In the give diagram, typical chordate plan is given. Identify A and B.

Options

  1. ANerve cord and myotomes
  2. BGut and vertebral column
  3. CNerve cord and notochord
  4. DNotochord and nerve cord.

Correct answer

C. Nerve cord and notochord

Step-by-step solution

Members possess 3 fundamental chordate 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) - Hollow, ectodermal and later on develop into CNS (central nervous system). 3 . Pharyngeal gill slits. - Bilaterally symmetrical, organ system level, triploblastic and eucoelomate.

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