Comparison of Animal Characteristics

Question 1

Symmetry;

• Cnidaria is ____
• Platyhelminthes,
• Annelida,
• Arthropoda and
• Chordata is ____

Answer 1

‘radial’.

‘bilateral’.

Question 2

Body layers;

• Cnidaria has ____
• Platyhelminthes,
• Annelida,
• Arthropoda and
• Chordata have ____

Answer 2

‘2’.

‘3’.

Question 3

Additional body cavity;

• Cnidaria and
• Platyhelminthes is ____
• Annelida,
• Arthropoda and
• Chordata is ____

Answer 3

‘acoelomate’.

‘coelomate’.

Question 4

Gut type;

• Cnidaria and
• Platyhelminthes
  ____
• Annelida,
• Arthropoda and
• Chordata
  ____

Answer 4

‘sac (1 opening)’.

‘one way (mouth, anus and specialised)’.

Question 5

Digestion;

• Cnidaria and
• Platyhelminthes is ____
• Annelida,
• Arthropoda and
• Chordata is ____

Answer 5

‘extra- and intercellular’.

‘extracellular only’.

Question 6

Circulatory system;

• Cnidaria have ____
• Platyhelminthes have ____
• In Annelida,
• Arthropoda and
• Chordata it is ____

Answer 6

‘none’.

‘none (distribution via gut extensions)’.

‘present (well developed)’.

Question 7

Segmentation;

• Cnidaria and
• Platyhelminthes have ____
• Annelida,
• Arthropoda and
• Chordata is ____

Answer 7

‘none’.

‘metameric’.

Question 8

Support;

• Cnidaria: ____
• Platyhelminthes: ____
• Annelida: ____
• Arthropoda: ____
• Chordata: ____

Answer 8

• Aqueous medium (hydrostatic in gut cavity)
• Solid mesoderm
• Hydrostatic (fluid in coelom in each segment)
• Coelom and exoskeleton
• Endoskeleton (bones and cartilage)