Is an earthworm Deuterostome Earth worms are in the phylum Annelida. Earthworms have a large cavity called the coelom, which runs through the length of the whole body. This is why earthworms are called protostomes. : 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 blastopore, the opening through which the cells migrated to form the three-layered embryo, will eventually become the mouth.
: 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. Deuterostomes include more complex animals such as chordates but also some “simple” animals such as echinoderms. blastopore becomes anus, spiral and indeterminate cleavage B. Protostomes include arthropods, mollusks, and annelids. Which of the following is descriptive of protostome A. What are protostomes and deuterostomes examples? The defining characteristic of the deuterostome is the fact that the blastopore (the opening at the bottom of the forming gastrula) becomes the anus, whereas in protostomes the blastopore becomes the mouth. Improve your grades and reach your goals with flashcards, practice tests and expert-written solutions today. Now, we have got the complete detailed explanation and answer for everyone, who is interested! In most phyla, the blastopore becomes the mouth animals with this type of development are called protostomes, meaning 'first (or primary) mouth'. Quizlet has study tools to help you learn anything.
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