Question

Define notochord and it's classification​

Answer 1

Explanation:

A notochord is a primitive beginning to the backbone. It appears in embryos as a small flexible rod made from cells from the mesoderm, which is one of the three layers of cells of embryos. Notochords are only found in the phylum chordata, a group of animals that includes humans

Answer 2

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★In anatomy, the notochord is a flexible rod made out of a material similar to cartilage. If a species has a notochord at any stage of its life cycle, it is, by definition, a chordate.

★ Embryos of vertebrates still form transient notochord structures today during the gastrulation phase of development.