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Sagot :
Option D. had a pharynx with slits, and the common ancestor of deuterostomes had an anterior skull.
Deuterostomia is an animal commonly characterized by way of its anus forming before the mouth for the duration of embryonic development. The institution's sister clade is Protostomia, an animal whose digestive tract improvement is more varied. a few examples of deuterostomes include vertebrates, sea stars, and crinoids.
The 3 fundamental clades of deuterostomes are Chordata (e.g. vertebrates), Echinodermata (e.g. starfish), and Hemichordata (e.g. acorn worms). collectively with Protostomia and their out-organization Xenacoelomorpha, those compose the Bilateria, animals with bilateral symmetry and three germ layers.
The embryonic improvement, metazoans are divided into protostomes and deuterostomes. Protostomes are primitive invertebrates whilst deuterostomes encompass chordates and echinoderms. This department is useful in understanding the relationships among one-of-a-kind groups of animals
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The common ancestor of deuterostomes had an anterior skull. was not segmented. had pentaradial symmetry. had a notochord. had a pharynx with slits.
A. had an anterior skull.
B. was not segmented.
C. had a notochord.
D. had a pharynx with slits.
E. both b and d
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