Platyhelminthes includes flukes, planaria and tapeworms Over 20,000 species exist. What is different about each group of organisms that requires us to classify them into multiple phyla? An active marine predator is found possessing these characteristics: a series of tentacles (modified from the foot), a highly developed nervous system, and elaborate image-forming eyes. Note that … Where exactly is the coelom in an animal? Nematodes or roundworms are a type of invertebrate, animals without . which of the following is radially symmetrical . So the key to the question was that your worm is segmented. In other words, they have a left and right half. Why aren’t all worms placed into one phylum? Some Annelida include bristleworms, earthworms, and leeches. The characteristic feature of these marine animals is that their bodies are divided into three parts – the anterior part with a preoral lobe, a collar, and the trunk. Biology deals with many kinds of worms. Some of these worms, such as tapeworms, are parasitic. Would you like to merge this question into it? Biology deals with many kinds of worms. Most flatworms are parasites that obtain their food from a host animal. Acorn worms are among the prominent members of this phylum. Title: Bell Ringer 02/04 Author: End User Last modified by: mark weese Created Date: 2/3/2010 8:57:08 PM Document presentation format: On-screen Show (4:3) – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 7238a2-OWYzN Below is a list of the Marine Phyla with a link to more information on the MESA site or on the web. Cestodes, which include blood parasites or flukes, Trematodes, which consist of . Which choice includes three different phyla of organisms commonly known as "worms"? Annelids are segmented worms. List of animal phyla is a list of the major groups of animals usually classified as a phylum.Modern sources have been used: the list is different from that of Linnaeus or Cuvier.A list of this type may be arranged alphabetically; equally it might be arranged according to evolutionary relationships. already exists. Accordingly, an earthworm is a round and cylindrical shaped worm, which survives under ground in the soil. A parasite lives inside or on another living organism. 26. Some marine worms … Which option correctly describes a nematode? the rapid adaptive radiation of marine animals that gave rise to most extant animal phyla . This is the difference between Nematodes and Annelids. C. Platyhelminthes, Annelida, Nematoda . have characteristically long bodies with segmentation . Let's take a brief detour and discuss the coelom because knowing what it is will help us distinguish among each of these worm Phyla. Nematodes are cylindrical and roundworms with un-segmented bodies. Nematoda, Cnidaria, Oligochaeta Cnidaria, Arthropoda, Corals Platyhelminthes, Annelida, Nematoda Nematoda, Platyhelminthes, Echinodermata . "Worm" is a rather vague term that is typically used to describe three different phyla: Anellida (segmented worms), Nematoda (round worms), and Platyhelminthes (flatworms). Platyhelminthes are flatworms. Worms are classified into three major phyla, or groups. A chordate (/ ˈ k ɔːr d eɪ t /) is an animal of the phylum Chordate (/ k ɔːr ˈ d eɪ t ə /).During some period of their life cycle, chordates possess a notochord, a dorsal nerve cord, pharyngeal slits, and a post-anal tail: these four anatomical features define this phylum.Chordates are also bilaterally symmetric, and have a coelom, metameric segmentation, and circulatory system. ATP-Man. However, the features listed above provide a way of categorizing animal phyla in terms of their body plans. Second, they have bilateral symmetry. Provide examples. Favourite answer . Which choice includes three different phyla of "worms"? Some are parasitic and live within other organisms. They contain rudimentary organ systems such as: a ladder-like nervous system with a small brain and in some … already exists as an alternate of this question. Unlike sponges, they have bodies that are radially symmetric, which means one side resembles the other if the animal is cut in half. This criterion allows us to distinguish. There is only one plane of symmetry by which the body can be divided into two equal halves. There are three animal phyla that include “worm” in their common names. Answer Save. Worm, any of various unrelated invertebrate animals that typically have soft, slender, elongated bodies. For a list of marine animals that have been called "sea worms", see sea worm. Why aren’t all worms placed into one phylum? Platyhelminthes, Annelida, Nematoda. They possess a true coelom, unlike nematodes which have a pseudocoelom. This organism is most likely a(n) _____. They are classified as acoleomates meaning they have no true body cavity ( coelom ). Nematoda, Platyhelminthes, Echinodermata. Would you like to make it the primary and merge this question into it? (Concept 33.5) roundworms : sea urchins : tapeworms : leeches : oysters: 21 . include leeches, earthworms, and polychaete worms : have characteristically long bodies with both internal and external segmentation : use their coeloms as hydrostatic skeletons : have a mouth that is separate from the anus. Phyla of protists One way to classify the protists would be to extend the three-part division of the higher kingdoms downward, with the three divisions of the protists becoming phyla. Annelida are also worms and include the earthworm and the leech. Which of the ... One of the criteria used to group animals into Kingdoms and Phyla is the presence or absence of a body cavity (coelom). 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