Multiple choice

Which of the following is one of the fundamental characters of chordates?

  1. Presence of limbs

  2. Presence of heart

  3. Presence of nervous system

  4. Presence of haemoglobin
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C Correct answer
Explanation

Presence of nervous system in the form of dorsal nerve cord is one of the fundamental characters of chordates.The dorsal nerve cord is later modified in vertebrates into the central nervous system which is composed of the brain and spinal cord. Dorsal nerve cord is mainly found in subphylum Vertebrata.

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