Flashcards in Invertabrate Biology Deck (83)
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1
What are the Classes located in Phylum Mollusca?
Class->
Bivalva
Gastropoda
Cephalopda
Polyplacophora
2
What animals are located in Class Bivalva?
Clams, oysters, Scallops, and Mussels
3
What does moluska mean?
Soft body
4
What are the 3 parts of a mollusk body?
Visceral mass
Mantle
Foot
5
What is most of a mollusk shell made of?
Calcium carbonate
6
How are the two types of the shell opened and closed in mollusks?
By adductor muscles
7
What part of the mollusk body is used for burrowing?
the foot
8
How is water circulated through mollusks?
by siphons
9
How do mussels attach themselves to intertidal structures?
by strong byssal threads
10
What are Geoducks?
Giant Clams
11
What do scallops posses that other shellfish do not?
Eyes with a lens and retina
12
What is the Periostracum layer on an oyster shell?
Outer protien layer
13
What is the Prismatic layer on an oyster shell?
Middle calcium carbonate CaCO3
-and the thickest layer
14
What is the nacreous layer on an oyster shell?
The 'mother of pearl' layer
15
Where do pearls form in an oyster?
Between nacreous layer and mantle
16
What is the umbo?
The oldest part of the shell->The 'hinge'
17
What animals are in class Gastropoda?
Snails and Slugs
18
Which has a shell?
Snails or slugs?
Snails have a shell, slugs do not
19
What do snails and slugs have for grazing on grass?
A radula
20
Do aquatic snails have seperate sexes?
yes
21
Do terrestrial snails have seperate sexes?
no, they are hermaphrodidic
22
When do snails retreat into their shell?
during dry periods
23
What is the unfortunate consequence of snails undergoing torsion during larvae development?
The anus ends up above the head
24
What modified radula does the cone snail possess?
A harpoon with a poisonious gland
25
What modified radula does the Moon snail possess?
Can drill holes into clam shells
26
What is a nudibranch?
A sea slug that doesnt have a shell
27
In sexual reproductio, where are sperm and eggs deposited?
Via cloaca conjugation
28
What animals belong in Class Cephalopoda?
Squid, Octopus, and Nautilus
29
What type of nervous system do cephalopods possess?
A highly developed nervous system with vertabrae like eyes
30
