Annalida, Mollusca

Question 1

Annelida

Answer 1

Leeches, earthworms

Question 2

Annelida characteristics

Answer 2

Triploblstic
coelomates
Protosomes: mouth forms first
bilateral symmetry
complete digestion (mouth and anus)
Reproductin: sexual- hermaphrodites, asexual- regeneration
circulatory system: closed circ system
Metanephridia: glands for excretion and osmoregulation
chaetae: hair like bristles that aid in traction
Oligochaetes and polychaetes- classes of annelids

Question 3

Mollusca

Answer 3

octopus, slugs, squids, clams

Question 4

Mollusca characteristics

Answer 4

Triploblastic
Coelomate
Protostome: mouth forms fitst
Bilateral symmetry
Reproduction: dioecious
complete digestion: uses radula
Metanepgridia for excretion; organ of bojanus
Circ system: open and closed
Respiratory: gills

Question 5

Body characteristics mollusca

Answer 5

Foor: used for locomotion and anchoring
Visceral mass: organs found inside
radula: tongue like organ with teeth like projections
mantle: tissue layer that secretes a hard shell

Question 6

Cephalopods

Answer 6

Head food mollusks
Octopi, squids, cuttlefish
Closed circ system

Question 7

Gastropods

Answer 7

stomach foot
snails and slugs
Open circ sysem
hemocoel: open space inside where blood can flow to surrounding tissues
torsion during larval stage: rotation of structures which brings the anus right above their heads

Question 8

Bivalves

Answer 8

Clams, scallops, oystes, mussles
suspension feeders
open circ system
hemocoel