Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
What causes wood pilings to collapse
|
ship worm--a mollusk
|
|
|
What are being used for plings instead of wood that shipworms damage
|
plastic or wood that is coated in a oil based product
|
|
|
The ship worm is not a worm what is it
|
miollusks
|
|
|
Name 2 mollusks that have no outer shell
|
octopus
squid |
|
|
What are mollusks called/class that have 2 shell parts
|
class bivalvia--pelecypods
|
|
|
What do all mollusks have
|
soft bodies composed of head foot and visceral mass(internal organs)
and either an internal or external shell coelom and brain |
|
|
what holds the 2 valves together in a bivalvia
|
adductor muscles
|
|
|
there are 2 scars on a 'valve' what causes them
|
adductor muscles
|
|
|
what bivalve has only 1 adductor muscle
|
scallop
|
|
|
Name 3 bivalves
|
clam, oyster, mussel, scallop
|
|
|
What feeds on clams
|
sea stars
|
|
|
How do you tell the age of a clam
|
liness on the shell like rings on a tree--ea line represents 1 year --some are wider than other which indicates more growth
|
|
|
What is a shell composed of
|
CaCO3
|
|
|
How does a bivalve build its shell
|
thin membrane called the mantle lines the inside of ea shell and protects the interanl organs--the mantle contains shell glands that secrete CaCO3-producing the shell
|
|
|
How does water flow in a bivalve
|
siphon tube that protrudes through a gap in the shells for feeding and breathing
incurrent and excurrent siphon |
|
|
what do the incurrent and excurrent siphons do?
|
incurrent-food and oxygen enter
excurrent -waste products of digestion and respiration are eliminated |
|
|
How do bivalves breath
|
gill membranes
|
|
|
How do bivalves feed
|
water containng plankton and organic debris pass into clam from the incurrent siphon and move along by ciliary action
|
|
|
How do clams ingest food
|
food particles get stuck in a mucus and the cillia move food into mouth in a 1 way digestive system
|
|
|
what kind of circulatory system do the bivalves have
|
open
|
|
|
how are nutrients and oxygen transported in a clam
|
colorless blood
|
|
|
What are byssal threads
|
attach mussel to rocks and other hard surfaces--a fibrous protein
|
|
|
Name some ways that bivalves attach to substrates
|
byssal threads, cement
|
|
|
How are pearls formed?
|
has same compostion as inside of shell--deveoles when a grain of sand lodges betw/mantle and shell--mantle reacts by secreting layers of shell around the grain
|
|
|
What is thw fastest bivalve
|
scallop
|
|
|
How does a scallop move
|
sudden spurts--the scallop repeatedly contracts and relaxes it large adductor muscle--the shell open and closes forcing out water-pushing the shell in opposite direction
|
|
|
What is the advantage of burrowing for a shell
|
escape predators
|
|
|
What is a 1 shelled shell (univalve) called/class
|
gastropoda
|
|
|
What does gastropoda mean
|
stomach footed
|
|
|
What is the most common gastropod
|
snails
|
