molluscs

Question 1

into which groups are molluscs divided

Answer 1

gastropods and bivalve molluscs

Question 2

name two species belonging to gastropods

Answer 2

great pond snail, common river snail, great ramshorn

Question 3

what are the 2 possible ways of respiration in garstropods

Answer 3

gills or lung

Question 4

what is a radula

Answer 4

snail’s rough tongue

Question 5

name the structure used for reproduction in gastropods

Answer 5

copulation pouch

Question 6

what provides the ability to open and close the shell in bivalve molluscs

Answer 6

anterior and posterior adductor muscles

Question 7

what is a siphon and what is its function

Answer 7

elongated mouth, used for food and oxygen consumption

Question 8

state 3 basic features in which the body structure of bivalves and gastropods differs

Answer 8

shape of the shell, bivalves have syphon, gastropods are hermaphrodites, overall body structure, respiration

Question 9

compare the feeding method in gastropods and bivalves

Answer 9

gastropods have radula, bivalves siphon