By the presence of which of the following is the Phylum Chordata characterized?

Options :
  1. spinal cord
  2. notochord
  3. nerve chord
  4. None of these


Answer and Explanation :-

Answer: Option 2

Explanation:

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The scepticism which men affect towards their higher inspirations is often not an honest doubt, but a guilty negligence, and is a sign of narrow mind and defective wisdom.
-James Martineau Tides of the Spirit: Selections from the Writings of James Martineau