Flashcards in Invertabrate Biology Deck (83)
What are the Classes located in Phylum Mollusca?
What animals are located in Class Bivalva?
Clams, oysters, Scallops, and Mussels
What does moluska mean?
What are the 3 parts of a mollusk body?
What is most of a mollusk shell made of?
How are the two types of the shell opened and closed in mollusks?
By adductor muscles
What part of the mollusk body is used for burrowing?
How is water circulated through mollusks?
How do mussels attach themselves to intertidal structures?
by strong byssal threads
What are Geoducks?
What do scallops posses that other shellfish do not?
Eyes with a lens and retina
What is the Periostracum layer on an oyster shell?
Outer protien layer
What is the Prismatic layer on an oyster shell?
Middle calcium carbonate CaCO3
-and the thickest layer
What is the nacreous layer on an oyster shell?
The 'mother of pearl' layer
Where do pearls form in an oyster?
Between nacreous layer and mantle
What is the umbo?
The oldest part of the shell->The 'hinge'
What animals are in class Gastropoda?
Snails and Slugs
Which has a shell?
Snails or slugs?
Snails have a shell, slugs do not
What do snails and slugs have for grazing on grass?
Do aquatic snails have seperate sexes?
Do terrestrial snails have seperate sexes?
no, they are hermaphrodidic
When do snails retreat into their shell?
during dry periods
What is the unfortunate consequence of snails undergoing torsion during larvae development?
The anus ends up above the head
What modified radula does the cone snail possess?
A harpoon with a poisonious gland
What modified radula does the Moon snail possess?
Can drill holes into clam shells
What is a nudibranch?
A sea slug that doesnt have a shell
In sexual reproductio, where are sperm and eggs deposited?
Via cloaca conjugation
What animals belong in Class Cephalopoda?
Squid, Octopus, and Nautilus
What type of nervous system do cephalopods possess?
A highly developed nervous system with vertabrae like eyes