Protostomes develop with the mouth forming from the blastopore, and include phyla like flatworms, nematodes, mollusks, annelids, and arthropods. Deuterostomes have the mouth form from a second opening on the dorsal surface while the blastopore becomes the anus, and include the phyla Chordata, Echinodermata, and Hemichordata. Deuterostomes also exhibit indeterminate development where cells remain capable of forming a complete organism even when separated, unlike determinate development where each cell's fate is predetermined.
Spring gala 2024 photo slideshow - Celebrating School-Community Partnerships
Distinguish between protostomes and deuterostomes. Identify the Phyla.pdf
1. Distinguish between protostomes and deuterostomes. Identify the Phyla that belong to each
group.
Solution
The maximum off coelomate invertebrates develop as protostomes ("first mouth"): in these
organism in which the oral end of the animal develops from blastopore. examples flatworms
nematodes mollusks , annelids and arthropod
====================================================== In the
deuterostomes including Echinodermata and the ancestors of the Chordata, the oral end of the
animal develops from a second opening on the dorsal surface of the animal;the blastopore
becomes the anus. :examples Chordata Echinodermata (starfish, sea urchins, sea cucumbers, etc.)
Hemichordata (acorn worms and graptolites)
==================================================================
The Deuterostomes also show indeterminate development, in Deuterostomes ,each of the cells of
the eight-cell embryo if separated remain capable of developing as complete organisms, in
contrast to determinate development, in which the development fate of each cell in the adult
organism has already been determined.