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Answer:

Their similarity

Explanation:

Pharyngeal pouches are structures in vertebrates that develop in different parts of the body mainly in the face or neck. The similarity in their position and structural indicates a similarity . These structures provide evidence of evolution that the organisms evolved from the same ancestry.

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A pharyngeal pouch (also known as Zenker's diverticulum) is a tiny bulge or pocket in the pharynx, similar to a hernia.

Pharyngeal pouches are transformed into different organs during evolution. This shows the relationship between different organisms using the pharyngeal pouch for different use.

Pharyngeal pouch

  • In embryological development, pharyngeal pouches are endodermal out-pockets that arise between the pharyngeal arches.

  • The pouches give rise to tissues that comprise the middle ear cavity and Eustachian tube, as well as the palatine tonsils, thymus, parathyroid glands, and thyroid parafollicular cells.

Thus, this is how the pharyngeal pouches are the evidence of evolution.

Learn more about Pharyngeal pouch, here:

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