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Chordates have single or paired gill sl...

Chordates have single or paired gill slits

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Hemichordates have pharyngeal gill slits which are

Chordate animals have

Non - chordates have

In higher chordates, pharyngeal gill slits are

In higher chordates, pharyngeal gill slits are

[A] : Chordates have poor regeneration power while non-chordates have good regeneration power . [R] : Non-chordates have asexual reproduction , so they have good regeneration power .

[A] : Chordates have an oxygen carrying pigment called haemoglobin . It is always present in red blood corpuscles . [R] : Non-chordates have either no haemoglobin or if it is present , it is present in plasma . Non-chordates require very little oxygen as compared to chordates for their body functions.

Which of the following statements is correct for the phylum whose organisms are characterized by the presence of a dorsal hollow nerve cord and paired pharyngeal gill slits ?