Phylum Chordata

Question 1

What are the subphylum’s in phylum Chordata?

Answer 1

• Urochordata
• Cephalochordata
• Hemichordata
• Vertebrata

Question 2

What are protosome vs. deuterostome?

Answer 2

• way to differentiate development
• protostome
  
  • blastophore to mouth
  • spiral clevage
• deuterostome
  
  • blastophore to anus
  • radial clevage

Question 3

What are the classes in subphylum Urochordata?

Answer 3

• class Ascidiacea
• class Larvacea
• class Thaliacea

Question 4

Ascidian characteristics:

Answer 4

• hermaphroditic
• free spawning
• closed circulatory system
• nervous system
• can be colonial social or solitary
• filter lots of water = contribute to marine snow
• can foul aquaculture
• genetic research
• food
• pharmaceuticals