Molluscs And annelids

Question 0

What are the two main traits of the cephalopoda?

Answer 0

Active, predatory swimmers

Tentacles surround the mouth located in the large head

Question 1

What are the synapamorphies of the molluscs?

Answer 1

Soft bodies with calcareous/protein shell
Reduced coelom to pericardial cavity
Open circulatory system

Question 2

What is the main trait of the bivalvia?

Answer 2

2 part dorsally hinged shell enclosed body

Question 3

What are the 3 key traits of the gastropoda?

Answer 3

Body undergoes torsion
Operculum
Only one opening of the shell

Question 4

What are the 4 classes of molluscs?

Answer 4

Polyplacophora
Gastropoda
Bivalvia
Cephalopoda

Question 5

What are the three layers of the shell?

Answer 5

Periostracum
Nacreous layer
Prismatic layer

Question 6

What are the 5 main characteristics of annelids?

Answer 6

Segmented worms
Conspicuously long bodies
Hydrostatic skeleton
Each section has it's own ganglia
Setal muscles

Question 7

What are the three classes of Annelida?

Answer 7

Polychaeta
Oligochaeta
Hirudinea

Question 8

What are the polychaeta?

Answer 8

Flatworms with filopodia for locomotion and gas exchange

Question 9

What are oligocheata?

Answer 9

Earthworms and leeches