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NTA Abhyas NEET2020BotanyAnimal KingdomPractice

Select the correct statement from the following.

Options

  1. ANotochord is found in all chordates.
  2. BPharynx is perforated by gill slits in non-chordates.
  3. CHearts is dorsal in birds.
  4. DBoth (A) and (C) are correct.

Correct answer

A. Notochord is found in all chordates.

Step-by-step solution

Features Chordates Non-chordates a. Notochord Present Absent b. CNS Single, dorsal and hollow Double, ventral and solid c. Cranium and vertebra Usually present Absent d. Pharynx Perforated by gill slits Gill slits absent e. Post anal tail Usually present Absent f. Heart Ventral Dorsal (if present)

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