What is the common feature that is used to include all animals in Phylum Chordata?

What is the common feature that is used to include all animals in Phylum Chordata?
  1. Presence of notochord
  2. Presence of dorsal hollow neural system
  3. Presence of both notochord and dorsal hollow neural system
  4. Presence of neither notochord nor dorsal hollow neural system

Solution

All these, based on the common features like presence of notochord and dorsal hollow neural system, are included in phylum Chordata.

Asked in: NCERT

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