WebMollusca [ m uh- luhs-k uh ] noun the phylum comprising the mollusks. There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to …
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WebMolluscs have a mantle or mass of soft flesh that covers the soft body and encloses the internal organs. In many species, the mantle produces a hard shell. Not all molluscs produce a shell. Many molluscs have a radula, which, in most species, is a rasp-like scraping organ used in feeding (Fig. 3.54). WebMar 8, 2024 · Phylum Mollusca (Mollusks) Etymology: From the Latin Molluscus, meaning soft of body. Characteristics of Mollusca: Bilaterally symmetrical. Body has more than two cell layers, tissues and organs. Body without cavity. Body possesses a through gut with mouth and anus.
WebMollusca (mŏl-lŭs′kă) A phylum of animals that includes the bivalves (mussels, oysters, clams), slugs, and snails. Snails are intermediate hosts for many parasitic flukes. Oysters, … Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks . Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of undescribed species is very high. Many taxa remain poorly studied.
WebFeb 9, 2024 · Updated on February 09, 2024. The radula is a special structure used by many mollusks to scrape food off rocks, to feed off of plants or create depressions in rocks that the mollusk uses for habitat. The radula has many rows of tiny teeth that are replaced as they wear down. Each row of teeth consists of marginal teeth, one or more lateral ... WebMollusca noun plural Mol· lus· ca mə-ˈləs-kə : a large phylum of invertebrate animals (as snails, clams, and mussels) that have a soft unsegmented body lacking segmented …
WebAn internal organ called the mantle secretes calcium carbonate so that as the inner invertebrate grows, the outer shell provides a roomier home. Many bivalve species play important roles in aquatic and marine ecosystems by …
WebDec 13, 2024 · Scientific Name: Mollusca (Caudofoveates, Solanogastres, Chitons, Monoplacophorans, Scaphopods, Bivalves, Gastropods, Cephalopods) Common Name: Mollusks or molluscs Basic Animal Group: Invertebrate Size: Microscopic to 45 feet in length Weight: Up to 1,650 pounds Lifespan: Hours to centuries—the oldest is known to have … balkan pes box 2022Web5. The development of ciliated cells and neurons, which enabled increased coordination and movement, is a key step in the progression of the nervous system from the Phylum Porifera to the Phylum Cnidaria to the Phylum Mollusca. This can be demonstrated by tracing the evolution of the nervous system from Porifera to Cnidaria to Mollusca. 6. arkansas virtual academy arWebFeb 10, 2024 · Mollusca (n.) "division of invertebrate animals with soft, unsegmented bodies, no jointed legs, and commonly covered by hard shells," 1797, from Modern Latin mollusca, chosen by Linnaeus as the name of an invertebrate order (1758), from neuter plural of Latin molluscus "thin-shelled," from mollis "soft" (from PIE root *mel- (1) "soft"). balkan pes box patchWebJun 8, 2024 · Figure 28.3 E. 1: Mollusk shells: Helix aspersa, a common land snail, has a calcium carbonate shell. Mollusks have a muscular foot used for locomotion and anchorage that varies in shape and function, depending on the type of mollusk under study. In shelled mollusks, this foot is usually the same size as the opening of the shell. arkansas virtual learning academyWebThe mantle (also known by the Latin word pallium meaning mantle, robe or cloak, adjective pallial) is a significant part of the anatomy of molluscs: it is the dorsal body wall which covers the visceral mass and usually protrudes in the form of flaps well beyond the visceral mass itself. In many species of mollusks the epidermis of the mantle ... balkan pesma nucciWebnoun [ C ] US (also mainly UK mollusc) us / ˈmɑː.ləsk / uk / ˈmɒl.əsk /. any animal that has a soft body, no spine, and is often covered with a shell. Many mollusks live in water: Oysters … arkansas virtual teaching jobsWebmollusc ( ˈmɒləsk) or mollusk n (Animals) any invertebrate of the phylum Mollusca, having a soft unsegmented body and often a shell, secreted by a fold of skin (the mantle). The group includes the gastropods (snails, slugs, etc), bivalves (clams, mussels, etc), and cephalopods (cuttlefish, octopuses, etc) balkan peninsula wwi