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Characteristic Features of Phylum Mollusca
- They are bilaterally symmetrical.
- They are triploblastic, which three layers.
- They show organ system grade of organisation.
- The body is soft and unsegmented.
- Body is divisible into three regions – head, a visceral mass, and ventral foot.
- Body is covered by a mantle and shell.
- What are two features of molluscs?
- What three features do most mollusks have?
- Which is a feature unique to mollusks?
- What are the characteristics of Mollusca that distinguish it from other phyla?
- What makes a mollusc a mollusc?
- What morphological feature gives the phylum Mollusca its name?
- What do gastropods and cephalopods have in common?
- What type of creature is a gastropod?
- What are the features of gastropods?
- What are 4 characteristics of gastropods?
- What are some characteristics of gastropods?
- What is the difference between mollusc and mollusk?
- What characteristics of phylum Cnidaria are most important in distinguishing from other phyla?
- What are 2 differences in phylum Mollusca and phylum echinodermata?
What are two features of molluscs?
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.
What three features do most mollusks have?
There are only three characteristics shared by all living mollusks: the presence of a mantle (the rear covering of the body) that secretes calcareous (e.g., calcium-containing) structures; the genitals and anus opening into the mantle cavity; and paired nerve cords.
Which is a feature unique to mollusks?
A feature unique to molluscs is a file-like rasping tool called a radula. This structure allows them to scrape algae and other food off rocks and even to drill through the shell of prey or catch fish.
What are the characteristics of Mollusca that distinguish it from other phyla?
Molluscs 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.
What makes a mollusc a mollusc?
mollusk, also spelled mollusc, any soft-bodied invertebrate of the phylum Mollusca, usually wholly or partly enclosed in a calcium carbonate shell secreted by a soft mantle covering the body.
What morphological feature gives the phylum Mollusca its name?
3. What morphological feature gives the phylum Mollusca its name? The word “mollusc” means “soft thing”. Molluscs have soft bodies and this feature explains the name of the phylum.
What do gastropods and cephalopods have in common?
Cephalopods and gastropods are two classes belonging to the phylum Mollusca of Kingdom Animalia. They have coiled shells. Both groups include aquatic animals. They are invertebrates.
What type of creature is a gastropod?
The Class Gastropoda (in Phylum Mollusca) includes the groups pertaining to snails and slugs. The majority of gastropods have a single, usually spirally, coiled shell into which the body can be withdrawn. The shell of these creatures is often what is recovered in a fossil dig.
What are the features of gastropods?
Most gastropods have a single, usually spirally coiled shell into which the body can be withdrawn, but the shell is lost or reduced some important groups. Gastropods are characterized by "torsion," a process that results in the rotation of the visceral mass and mantle on the foot.
What are 4 characteristics of gastropods?
The body of gastropods in general consists of four parts that are head, mantle (shell), muscular foot and a mass or hump of organs generally enclosed in a shell. Gastropods feed on plants, small insects, decaying matter or sometimes small organisms in water.
What are some characteristics of gastropods?
Gastropods are asymmetrical molluscs that underwent torsion. The body is generally divided into 2 main re- gions: (1) head-foot and (2) mantle (including shell), mantle cavity, and visceral mass. In most gastropods the muscular foot is the locomotion organ; gastropods mainly crawl, attach, or burrow using the foot.
What is the difference between mollusc and mollusk?
As nouns the difference between mollusk and mollusc
is that mollusk is (us) (mollusc) while mollusc is a soft-bodied invertebrate of the phylum mollusca, typically with a hard shell of one or more pieces.
What characteristics of phylum Cnidaria are most important in distinguishing from other phyla?
What characteristics of Phylum Cnidaria are the most important in distinguishing it from other phyla? They are sessile, radial symmetry, production of nematocysts.
What are 2 differences in phylum Mollusca and phylum echinodermata?
The key difference between Mollusca and Echinodermata is the habitat they live in. Molluscs live in both terrestrial and aquatic environments. In contrast, echinoderms only live in marine environments. ... Clams, oyster and squid, are some molluscs while sea cucumber, starfish and sea urchin are some echinoderms.
