Lab 2 Pre Lab Quiz Questions Flashcards
- Define triploblastic.
Animals that have three germ layers
- Name a phylum that includes triploplastic organisms that do NOT have a coelom.
Platyhelminthes
- 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)
- Name a specimen from today’s lab that doesn’t have a circulatory system.
Planarian
- What are chromatophores?
Specialized pigment cells that allow the animal to rapidly change the colour of their skin
- What is the role of the pneumostome?
Allows air to enter a highly vascularised section of the mantle cavity (Gas exchange)
- What is the function of the radula?
Helps provide some mechanical breakdown of food (a grinding action) before digestion
- What is the role of a siphon?
Allows water to flow for purposes such as locomotion, feeding, respiration, and reproduction.
- Which specimen from Phylum Mollusca has a parasitic larval stage?
Freshwater Mussels
- Do all molluscs have shells?
No
- What is the role of a rostellum?
To help the animal adhere to the hosts’ intestine so it can feed
- The body of a tapeworm can be divided into three main sections. Name them.
Strobila
Neck
Scolex
- Name the process that forms proglottids.
Strobilation
- What symmetry do all the phyla in today’s lab have?
Bilateral symmetry
- Name 2 specimens that use a muscular foot for locomotion.
Freshwater Mussels
Land Snails
- What is the oldest part of the snail shell?
The Apex
- What is the oldest part of the mussel shell?
The Umbo
- What is the purpose of the squid’s ink sac?
To eject a cloud of ink through its siphon to startle or deter predators, and to create a kind of “smoke screen” while it escapes.
- Which organisms from today’s lab breathe with gills?
Freshwater Mussels
Squids
