Molluscs

Question 1

Symmetry, blastia and coelom

Answer 1

Bilateral, triploblastic and coelomate

Question 2

Give the 3 main body parts of a mollusc and their function

Answer 2

Muscular foot - for movement or anchorage
Visceral mass - Contains internal organs
Mantle - tissue over visceral mass that secretes the shell

Question 3

What covers the radula

Answer 3

Chitinous teeth

Question 4

What is around the esophagus and what extends from it

Answer 4

A nerve ring from which ventral nerve cords extend

Question 5

What is the name of the structure that removes metabolic waste

Answer 5

Metanephridia

Question 6

What is the ciliated larval stage in molluscs called

Answer 6

Trochophore

Question 7

What is the class Polyplacophora also known as and how many dorsal plates is it divided into

Answer 7

Chitons - 8

Question 8

Give an example of the class Gastropoda and what is the name of its embryonic process

Answer 8

Cone snail - Torsion

Question 9

How does the class Bivalvia feed and what is the name of the muscles that draws halves together for protection

Answer 9

Suspension feeding - Abductor muscle

Question 10

How do Cephalopods move

Answer 10

Draw water into the mantle cavity and expel via siphon - Jet Propulsion

Question 11

What is the function of chromatophores

Answer 11

Camouflage