Bivalves Lack Which of the Following Molluskan Features

Reduced cephalization contain a muscular foot and a mantle may possess a hard outer shell. This is the class where the members are characterized by having a shell.

Morphogenetic Classification Of Bivalve Ribs With Indica Tion Of The Download Scientific Diagram

Bivalvia is a class of Mollusca.

. There is no proper cranium. - Shells - Visceral mass - Head - Foot - Mantle. There is no proper cranium.

A radula is which of the following. The shell has right and left halves and is hinged at the back. They include the clams oysters cockles mussels scallops and numerous other families that live in saltwater as well as a number of families that live in freshwater.

One of the main traits of all bivalves is the absence of a head and its associated organs such as eyes head tentacles and mouthparts. A mantle is found only among the a. The shell is composed of right and left halves.

Bivalves lack which of the following molluscan features. Bivalves lack a head. Bivalves as a group have no head and they lack some usual molluscan organs like the radula and the odontophore.

Bivalve shells consist of calcium carbonate CaCO 3 crystals embedded in a proteinaceous matrix both secreted by underlying mantle tissue. Bivalves lack which of the following molluskan features. Lack of cephalization every member of the group will have a hard outer shell as well as a complete digestive system.

Scientists believe that early ancestors of bivalves had heads like their close relatives the snails but that bivalves have lost the feature. The organisms dont have radula and jaws as well. Which of the following list of features describes the molluscs and bivalves but not the annelids.

Organisms of this class are characterized by having a two-valve shell. Bivalvia is a class of Mollusca also known as Pelecypoda. What makes Bivalves distinctive is that they lack ahead.

Lack of cephalization contains circular muscles that enable them to move may possess a hard outer shell and have a complete digestive system. Bivalvia 333 FIGURE 2 General external anatomy of the soft tissues of A corbiculoidean B unionoidean and C dreissenoidean freshwater bivalves. The features found in the molluscs and bivalves but not the annelids include lacking cephalization containing a muscular foot and a mantle may posses a hard outer shell and have a complete digestive system.

The organisms also do not have radula and jaws.

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1 Habitus Of Different Bivalves A Pteria Colymbus From Bahamas Download Scientific Diagram