Answer
Radula: A rasping tongue, found in most molluscs.
Odontophore: Tooth-bearing organ in molluscs, including the radula, radular sac, muscles, and cartilages.
Periostracum: Outer keratinized layer of a mollusc shell.
Prismatic Layer: The middle layer of the shell, which is composed of densely packed prisons of calcium carbonate.
Nacreous Layer: Innermost lustrous layer of a mollusc shell, secreted by mantle epithelium.
Trochophore: A free-swimming ciliated marine larva characteristic of most mollusks and certain ectoprocts, brachiopods, and marine worms; an ovoid or pyriform body with a premolar circlet of cilia and sometimes a secondary circlet behind the mouth.
Veliger: Larval form of certain molluscs; develops from the trochophore and has the beginning of a foot, mantle, and shell.
Work Step by Step
Radula: A rasping tongue, found in most molluscs.
Odontophore: Tooth-bearing organ in molluscs, including the radula, radular sac, muscles, and cartilages.
Periostracum: Outer keratinized layer of a mollusc shell.
Prismatic Layer: The middle layer of the shell, which is composed of densely packed prisons of calcium carbonate.
Nacreous Layer: Innermost lustrous layer of a mollusc shell, secreted by mantle epithelium.
Trochophore: A free-swimming ciliated marine larva characteristic of most mollusks and certain ectoprocts, brachiopods, and marine worms; an ovoid or pyriform body with a premolar circlet of cilia and sometimes a secondary circlet behind the mouth.
Veliger: Larval form of certain molluscs; develops from the trochophore and has the beginning of a foot, mantle, and shell.
