Mollusca, Annelida, Brachiopoda, Platyhelminthes, Nematoda

Question 1

Lophotrochozoa

Answer 1

widest range of animal body forms
has 2 structures
1. lophophore
2. Trochophore larva

• Bilaterian animals
• Coelom and digestive tract with
  two openings
• Flatworms, rotifers,
  brachiopods, molluscs, annelids

Question 2

clade Lophotrochozoa: phylum mollusca

Answer 2

common structure- soft-bodied, muscular foot (movement and prey, etc)

mantle and mantle cavity- water filled chamber with gills, a, etc

radula (function like tongue to scrape algae)

visceral mass: houses internal organs and is pushed in because of large foot

Question 3

phylum annelid

Answer 3

annelid= little rings
segmented worms- live in damp soil and organs are compartmentalized

has trochophore larvae

Question 4

annelid clade Errantia (scale worms)

Answer 4

very mobile, segmented worms, mostly marine. predetors and can be grazers

Question 5

annelid clade sedentaria

Answer 5

seden= dont move
marine sediment, soil (earthworms extract nutrients from soil)
may have gills if living in tubes
leeches- can be predators and feed on other invertebrate

Question 6

phylum brachiopoda

Answer 6

member of lophotrochozoa clade

no lophophore or trochophore

dorsal and ventral shell (unlike clam)

Question 7

phylum platyhelminthes

Answer 7

mouth in middle of body
gastrovascular cavity instead of complete gut (waste and food through mouth)- cant get big (gas exchange through skin)
light sensitive eyes (radimetary cephalization)