Week 6: Lecture 5: Invertebrates (non-arthropods): Molluscs Flashcards
1
Q
Phylum Mollusca
A
Snails, clams and octopuses
2
Q
Symmetry of the phylum mollusca
A
Bilateral symmetry
3
Q
Are the phylum mollusca acoelomates?
A
No, they are coelomates
4
Q
Three characteristics of the phylum mollusca
A
- muscular foot for locomotion
- head generally well developed, radula for feeding
- mantle membrane secretes shell (some have lost the shell)
5
Q
Phylum Mollusca environment
A
Majority are aquatic, some species are able to live on land
6
Q
Three classes of the Phylum Mollusca
A
Class Bivalvia
Class Gastropoda
Class Cephalopoda
7
Q
Which class are snails in?
A
Class Gastropoda
8
Q
Why is bilateral symmetry obscured in some of the groups of the Phylum Mollusca?
A
Torsion of the body (snails)
