Molluska 1
This tissue secretes the shell and creates the mantle cavity.
What is the mantle?
These pigment-containing cells allow cephalopods to camouflage rapidly.
What are chromatophores?
This class of molluscs has 8 dorsal calcareous plates.
What is Polyplacophora?
These internal walls separate each annelid body segment.
What are septa?
This structure in earthworms produces a cocoon during reproduction.
What is the clitellum?
This chitinous feeding structure contains rows of “teeth” used for scraping algae.
What is the radula?
This circulatory system type is found in most molluscs except cephalopods.
What is open circulation?
This environmental issue decreases ocean pH and weakens CaCO₃ shells.
What is ocean acidification?
This class includes motile polychaetes with parapodia.
What is Errantia?
This family includes earthworms such as Lumbricus terrestris.
What is Lumbricidae?
This 180-degree rotation occurs during gastropod development.
What is torsion?
This layer of the shell is also known as “mother-of-pearl.”
What is the nacreous layer?
These muscles allow a bivalve to close its shell tightly.
What are adductor muscles?
These fleshy appendages are used for locomotion and respiration in many marine annelids.
What are parapodia?
These annelids are dorsoventrally flattened and have anterior and posterior suckers.
What are leeches?
These molluscs have two hinged shells and lack a head and radula.
What are bivalves?
This larval stage develops after the trochophore and has a developing shell.
What is the veliger larva?
This term refers to repeated body segmentation in annelids.
What is metamerism?
These bristle-like structures attach to parapodia and aid in movement.
What are chaetae?
This sister clade to Annelida includes unsegmented “peanut worms.”
What is Sipuncula?
This digestive structure in bivalves aids in food breakdown.
What is the crystalline style?
This class of molluscs includes squid, octopus, and nautilus and has closed circulation.
What is Cephalopoda?
This type of skeleton uses fluid-filled coelom and muscles for movement.
What is a hydrostatic skeleton?
This reproductive process forms a pelagic reproductive individual from a benthic worm.
What is epitoky?
This ecological process improves soil health through worm activity and sediment mixing.
What is bioturbation?