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NTA Abhyas NEET2020BotanyAnimal KingdomPractice

Which of the following is a common feature of Ascidia, Pristis, Hyla and Calotes?

Options

  1. ASkeleton made up of cartilage and bone
  2. BSolid, dorsal and double nerve cord
  3. CThree chambered heart with closed circulatory system
  4. DPaired pharyngeal gill slits at least in embryonic stage

Correct answer

D. Paired pharyngeal gill slits at least in embryonic stage

Step-by-step solution

Ascidia is a urochordate with an open circulatory system and is a protochordate. Pristis is a cartilaginous sawfish and is jawed vertebrae bear fins. Hyla is a tree frog with a bony skeleton. Calotes is a garden lizard with bony skeleton all these animals bears the paired pharyngeal gill slits at least in the embryonic stage (chordates have the dorsal, hollow nerve cord).

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