Question

Difference between enchinodermata and protochordata

Answer 1

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⭕️✨Echinodermata- These are the groups of animals under non-chordates that do not have notochord. Notochord is a rod-like structure that separates the nervous system from the gut and also acts as a support. Echinoderms in the larval stage have bilateral symmetry and as adults, they have radial symmetry. They have a ventral nerve cord. Their central nervous system is ventral, solid and double. They do not have have paired gill pouches.

⭕️✨Protochordates are an informal category of animals (i.e.: not a proper taxonomic group), named mainly for convenience to describe invertebrate animals that are closely related to vertebrates. This group is composed of the Phylum Hemichordata and the Subphyla Urochordata and Cephalochordata.

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Answer 2

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1. The main difference between echinoderms and chordates is that the echinoderms have a mesodermal skeleton made up of calcite known as ossicles whereas chordates have an internal skeleton made up of bones and cartilages.
2. Furthermore, echinoderms show radial symmetry while chordates show bilateral symmetry.

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