Q.1
What are two defining traits of a mollusk?
  • Soft-Bodied
  • Internal or External Shell
  • Stomach
  • Both A & B
Q.2
What are the three major classes of mollusks?
  • Gastropods
  • Bivalves
  • Cephalopods
  • All of above
Q.3
How do cephalopods and gastropods reproduce?
  • internal fertilization by specialized appendage
  • external fertilization by expelling gametes in the water
Q.4
Bivalves reproduce by
  • expelling gametes into the water
  • internal fertilization by a specialized appendage
Q.5
All molluscs have shells.
  • true
  • false
Q.6
Cephalopods use these colored pigment cells that can contract and expand in order to produce colors, textures and patterns.
  • Chromatophores
  • Ctenidia
  • Olfactory Receptors
  • Radulations
  • Mantle Pores
Q.7
This appendage of the mollusc is used for movement and grasping.
  • Foot
  • Mantle
  • Radula
  • Ctenidia
  • Limpet
Q.8
Which class of Mollusks have many species that are sessile?
  • Gastropods
  • Bivalves
  • Cephalopods
  • arthropods
Q.9
Which class of molluscs include clams, scallops, and mussels?
  • Gastropoda
  • Bivalvia
  • Cephalopoda
Q.10
How do bivalves feed?
  • Filter feeders
  • Radula
  • Tentacles
Q.11
What type of symmetry do molluscs have?
  • Asymmetrical
  • Bilateral
  • Radial
Q.12
These molluscs have a head and a modified foot that are now arms or tentacles.
  • Cephalopods
  • Nudibranches
  • Gastropods
  • Bivalves
  • Ctenidia
Q.13
This is the outer fold of skin on molluscs, and is responsible for excreting the substance that forms the mollusc's shell.
  • Radula
  • Mantle
  • Foot
  • Ctenidia
  • Cockle
Q.14
The shell of a mollusc is made out of what compound?
  • Calcium Carbonate
  • Calcium Phosphate
  • Calcium
  • Iron Phosphate
  • Strontium Chloride
Q.15
This file-like ribbon of "teeth" is used by molluscs to scrape algae and other food off of rocks and can even drill through the shells of prey.
  • Calcium Carbonate
  • Radula
  • Foot
  • Mantle
  • Ctenidia
Q.16
What does the term mollusca mean in Latin?
  • Soft-bodied
  • Hard-bodied
  • Foot
  • Slimy
  • Seafloor
Q.17
The squid has a well developed _________________ circulatory system
  • Closed
  • Open
  • IDK
  • Well developed
Q.18
Which is not why a giant squid is a formidable predator?
  • Strong/Muscular arms and tentacles
  • Large, well developed eyes
  • Small beak
  • Strong specialized mouth with toxic saliva
Q.19
The squid brain is the most __________________ invertebrate brain and is composed of the typical molluscan ganglia that have fused
  • complex
  • simple
  • compelling
  • closed
Q.20
Where do fertilized eggs develop?
  • Uterus
  • Externally
  • Cervix
  • Gills
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