Lab 2 Flashcards
Define Triplobastic
3 germ-layer
Name a phylum that includes triploblastic organisms that do NOT have coelom.
Platyhelminthes (flatworm)
Which of the following is NOT a Mollusc?
Chitons, Snails, Planaria, Cuttlefish
Planaria
Which of the following is a function of auricles?
a) used for touch
b) used for hearing
c) used for olfaction
d) a and c are correct
e) b and c are correct
D) touch and olfaction
Name a specimen from today’s lab that DOESN’T have a circulatory system.
Flatworm (Platyhelminthes)
What are chromatophores?
Specialized pigments used to change the skin colour of the organism
Dark spots on the skin of squids
*used to help with camouflage and communication
What is the role of the pneumostome?
Allows air to enter a highly vascularized section of the mantle cavity
What is the role of the radula?
Helps provide mechanical breakdown of food before digestion
What is the role of a siphon?
It’s a funnel that forces water from the siphon to create a jet-propulsion
Do all molluscs have shells?
No
Which specimen from Phylum Mollusca has a parasitic larva stage?
Bivalvia ( freshwater mussels )
What is the role of a rostellum?
Contain a hook that helps animals adhere to the hosts’ intestine so it can feed
The body of a tapeworm can be decided into 3 main sections. Name them.
Strobila, neck, scolex
Name the process that forms proglottids
Strobilation
What symmetry do all the phyla in this lab have?
Bilateral
Name 2 species that use a muscular foot for locomotion.
Mussels and Snails (Bivalvia & Gastropoda)
What is the oldest part of the snail shell?
Apex
What is the oldest part of the mussel shell?
Umbo
What is the purpose of the squid’s ink sac?
Eject a cloud of ink through siphon to startle or deter predators, and to create a kind of “smoke screen” while it escapes.
Which organisms from this lab breathe with gills?
Bivalvia and Cephalopoda (freshwater mussels and squids)
