: any of a major division (Deuterostomia) of the animal kingdom that includes the bilaterally symmetrical animals (such as the chordates) with indeterminate cleavage and a mouth that does not arise from the blastopore. The opening that forms first, the blastopore, becomes the mouth of the organism. : any of a major group (Protostomia) of bilateral metazoan animals (such as mollusks, annelids, and arthropods) characterized in typical forms by determinate and spiral cleavage, formation of a mouth and anus directly from the blastopore, and formation of the coelom by splitting of the embryonic mesoderm - compare. This gives rise to the term schizocoelomate, which is essentially a protostome as the coelom forms by splitting.

the mouth forms from the second embryonic opening, not from the blastopore E. blastopore becomes anus, spiral and indeterminate cleavage B. the coelom forms from mesodermal outpocketings of the gut C. Deuterostomes include more complex animals such as chordates but also some “simple” animals such as echinoderms. Which of the following is descriptive of protostome A. Protostomes include arthropods, mollusks, and annelids. 06:17:25 Study now Best Answer Copy In protostome development, the blastopore, or the first opening in development, becomes the animals mouth. What are protostomes and deuterostomes examples? Now, we have got the complete detailed explanation and answer for everyone, who is interested! Digestive tube (c) Fate of the blastopore. Protostome development (examples: molluscs, annelids) Deuterostome development (examples: echinoderms, chordates) Anus.

This is a question our experts keep getting from time to time. In protostome development, the blastopore becomes the mouth In deuterostome development, the blastopore becomes the anus.

Protostome blastopore becomes