BIO CH The three major groups of mollusks are the gastropods (snails and slugs), the bivalves (clams, oysters, scallops), and the cephalopods (octopuses and squids). Many mollusks feed using a rasping, tonguelike structure called the radula. The nephridium is an organ used by mollusks to maintain osmotic balance. Mollusca. The three most universal features defining modern molluscs are a mantle with a significant cavity used for breathing and excretion, the presence of a radula (except for bivalves), and the structure of the nervous system. Other than these common elements, molluscs express Kingdom: Animalia. Molluscs. Main characteristics of Mollusca: 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: Unsegmented soft body with bilateral symmetry Presence of an internal or external shell A toothed tongue (made mostly of chitin).

All mollusks possess which three features

Characteristics of Mollusca: 1)Bilaterally symmetrical. 2)Body has more than two cell layers, tissues and organs. 3)Body without cavity. 4)Body possesses a through gut with mouth and anus. 5)Body monomeric and highly variable in form, may possess a dorsal or lateral shells of protein and calcareous spicules. Mar 08,  · Of Snails and Squids: Characteristics of the Adaptive Mollusk. The body can be separated into three basic parts, the head, mantle, and a muscular foot. It is the mantle that forms the shell and also increases it in size. Some species possess internal skeletons, examples of which are the cuttlefish and the CircleEnsembleTheatre.com: Ningthoujam Sandhyarani. Molluscs. Main characteristics of Mollusca: 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: Unsegmented soft body with bilateral symmetry Presence of an internal or external shell A toothed tongue (made mostly of chitin). Mar 09,  · Best Answer: [1] They all contain a soft body containing a visceral mass, a foot and a mantle [2] The mantle secretes a hard shell [3] They all exhibit bilateral symmetry [4] Radula for scraping usually present [5] They are all protostomes (the first opening Status: Open. The phylum Mollusca includes the gastropods (snails, slugs, and periwinkles), bivalves (clams, oysters, mussels, and scallops), cephalopods (octopods and squids), and other, smaller classes. All mollusks, except the cephalopods, have a highly muscular organ called the foot, through which muscle fibres run in all.In general, mollusks have 3 body regions: a head, a visceral mass, and a In addition, some Mollusk radulae are impregnated with magnetite to give them superior wear characteristics. Clams, mussels, oysters and scallops are all bivalves. "More than 50 mollusc species are known as well as 30 extinct. all molluscs have different diets depending on class and surroundings; organisms like. This is a description of their main characteristic -all molluscs ave a soft body, which (with the 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. The major classes of living mollusks include gastropods, bivalves, and Most shelled gastropods have a one-piece shell that is typically coiled or spiraled, but not all gastropods have shells. Cephalopods have three hearts that pump blue blood, they're jet What is the defining feature of a bivalve?. Learn about the characteristics that define mollusks, or phylum Mollusca, and gastropods) to 4 feet (giant clam); Lifespan: 3 years to over ; Diet: Least concern; mollusks make up nearly one-fourth of all marine animals on Earth. In addition to a shell, most mollusks have a muscular foot for creeping.

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Phylum Mollusca, time: 10:05
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2 thoughts to “All mollusks possess which three features

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