what kind of symmetry do mollusks have
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Molluscs A ll modern mollusks have the same fundamental body plan. There are three distinct body zones: a head-foot, a visceral mass and a mantle. Some common features are 1  : Unsegmented soft body with bilateral symmetry.
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Radial symmetry 1 radial symmetry. 2  HOWEVER, their larvae have bilateral symmetry so the echinoderms probably evolved from bilaterally symmetrical ancestors and properly belong in the Bilateria. 3  water vascular system. 4  Seawater is taken into a system of canals and is used to extend the many tube feet.
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- Weegy: Some type of body symmetry is found in all invertebrates EXCEPT in Sponges, answer s letter C. samn|Points 3904|User: Bilateral symmetry enables the A. division of the body into upper and lower sides. B. animal to have a right and left side.
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What is the symmetry of an earthworm? There are three types of symmetry in biology: Radial, bilateral, and asymmetry. Your son's teacher is most likely only concerned with the first two. Humans have bilateral symmetry. You can divide them into two equal parts.Starfish have radial symmetry.arthworms may appear to have radial symmetry because of their cylindrical shape, but DON'T BE FOOLED! They actually have BILATERAL symmetry. This is because they have an up and down (dorsal and ventral), and front and back (andterior and posterior). Linus · 9 years ago. Thumbs up.
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- All cnidarians have radial symmetrical. There are two major body forms among the Cnidaria-the polyp and the medusa. Sea anemones and corals have the polyp form, while jellyfish are typical medusae.
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snails and slugs The Class Gastropoda includes snails and slugs. Most gastropods have a single, usually spirally coiled shell, but the shell is lost or reduced in some groups. Many snails have an operculum, a plate that closes the gastropod's opening.Shelled gastropods have mantles, while those without shells have reduced to absent mantles. Gastropods have a muscular foot used for creeping in most species. In some, the foot is modified for swimming or burrowing.Most gastropods have a well-developed head that includes eyes at the end of one to two pairs of tentacles.any snails have an operculum, a plate that closes the gastropod's opening. Shelled gastropods have mantles, while those without shells have reduced to absent mantles. Gastropods have a muscular foot used for creeping in most species. In some, the foot is modified for swimming or burrowing.
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Gastropoda Many snails have an operculum, a horny plate that seals the opening when the snail's body is drawn into the shell. Gastropods have a muscular foot which is used for creeping locomotion in most species. In some, it is modified for swimming or burrowing.Most gastropods have a well-developed head that includes eyes, 1-2 pairs of tentacles, and a concentration of nervous tissue (ganglion).astropods are characterized by torsion, a process that results in the rotation of the visceral mass and mantle on the foot. The result is that the mantle cavity (including anus) lies in the anterior body, over the head and mouth, and the gut and nervous system are twisted.
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What type of symmetry does a mollusk have? Do mollusks have radial or bilateral symmetry? Some bivalves, which are mollusks, have bilateral symmetry. Radial symmetry is typical of starfish, urchins, and sea anemones, which are echinoderms.
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Features Used to Classify Animals Animals can be classified by three types of body plan symmetry: radial symmetry, bilateral symmetry, and asymmetry. Learning Objective. Key Points. Animals with radial symmetry have no right or left sides, only a top or bottom; these species are usually marine organisms like jellyfish and corals.
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Phylum Mollusca Many species have a calcareous shell. Molluscs are bilaterally symmetrical, although some have secondarily lost the symmetry in part; they have well-developed excretory, digestive, respiratory and circulatory systems. In all molluscs except the cephalopods, the circulatory system is open.
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Invertebrate The body plans of most multicellular organisms exhibit some form of symmetry, whether radial, bilateral, or spherical. A minority, however, exhibit no symmetry. One example of asymmetric invertebrates include all gastropod species. This is easily seen in snails and sea snails, which have helical shells.
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- Marine animals that exhibit radial symmetry include: 1  Coral polyps. 2  Jellyfish. 3  Sea anemones. 4  Sea urchins.
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- The new feature this time shows up in a few mollusks, such as the chitons, but its unclear what effect it had on most of the mollusks history. There seems a good chance that this chapters group has some mollusks on its family tree. The feature is segmentation (technically called metamerism, probably to avoid confusion among all the different types of segments in animals).
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What kind of symmetry do mollusks and echinoderm have? according to animal classification into bilateria and radiata (ACCORDING TO SYMMETRY)the echinoderms and molluscs are bilaterally symmertrical as they are placed in BILATERIA.
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-   The symmetry of an earthworm is bilateral symmetry, which means only one line of symmetry. 3 people found this useful. Edit. Share to: 1  Eliminating Worms in the Intestines Intestinal parasites can be caused by drinking contaminated water or eating contaminated food.he type of symmetry found in all adult achinoderms is B. Radial. 3 people found this useful. Edit. Share to: Judy Olmsted. 80,355 Contributions. Retired college science professor.
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What type of symmetry does a starfish have? they have radially symmetrical  ANS2:  They appear to have radial symmetry but closer inspection will show  that the madreporite (sieve plate) is not centered and the anima … l's  behavior demonstrates that it has a preference in its axis of  motion i.e., it has a head end even though it has no head.
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What Is A Shell? Mollusks are classified into major groupings according to the characteristics of their shells. Snails (Gastropoda) have a single shell which spirals outward and to one side as it grows. Most Cephalopoda (octopi and squid) have no shell, but the Chambered Nautilus of that group has a shell.
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- Answer by Haj86. Confidence votes 6. Some well known gastropods, which are mollusks, are snails and slugs, and they exhibit what is known as BILATERAL SYMMETRY. The only other kind of symmetry that exists in the animal kingdom, with the exception of colonial species such as the sponge, is RADIAL SYMMETRY.
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Symmetry In spherical symmetry, illustrated only by the protozoan groups Radiolaria and Heliozoia, the body has the shape of a sphere and the parts are arranged concentrically around or radiate from the centre of the sphere.
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- M aybe you think that snails, clams, mussels, squid, and octopods are very different. Yet, they are all in the same category of animals known as mollusks and are structurally similar. Mollusks are some of the most well known of invertebrate sea creatures (there are over 50,000 species).Some are very rare and are only found in very deep-water. Mollusks have three body regions. aybe you think that snails, clams, mussels, squid, and octopods are very different. Yet, they are all in the same category of animals known as mollusks and are structurally similar. Mollusks are some of the most well known of invertebrate sea creatures (there are over 50,000 species).
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- Mollusks and segmented worms have a one-way digestive system, a separate mouth and anus, and their larvae are very similar. This is the best evidence that they have a common a … ncestor.12 people found this useful.cientists also believe they have a common ancestor because both phylla contain species w … hich produce free-swimming Trochophore Larvae (most molluscs except Cephalopods, and Class Polychaeta in Annelids). 2 people found this useful.
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- Echinoderms are the only invertebrates that have five sided radial symmetry. Some may only have radial symmetry for part of their lives. Some, as adults, exhibit bilateral sym … metry.chinoderms also display radial symmetry as do the jellyfish and sea anemones. If you want to tag the one thing that echinoderms have that no other living invertebrate has, you would probably have to point to their water vascular system (see link).
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Features Used to Classify Animals 1 Only sponges (phylum Porifera) have asymmetrical body plans.  Some animals start life with one type of body symmetry, but develop a different type as adults; for example, sea stars are classified as bilaterally symmetrical even though their adult forms are radially symmetrical.
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Difference Between Radial and Bilateral Symmetry In radial symmetry, there are identical body parts that are distributed in a circular arrangement around a central axis. Coelenterates (aka Cnidarians) and Echinoderms are the two best examples with the presence of this kind of body symmetry.n radial symmetry, there are identical body parts that are distributed in a circular arrangement around a central axis. Coelenterates (aka Cnidarians) and Echinoderms are the two best examples with the presence of this kind of body symmetry.
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- The cephalopods appear to be very different from other mollusks, but physiologically they are similar. Cephalopods, like most mollusks, have a mantle, a mantle cavity, a radula, and a U-shaped digestive tract. Cephalopods have two kidneys and three hearts, which pump blue blood. They are carnivores that feed on fish, shrimp, crabs and other cephalopods.