Molluscs

Question 1

polyplachophora head

Answer 1

no sense organs

has radula

Question 2

polyplachophora foot

Answer 2

has mucus glands

Question 3

water flow through mantle cavity

Answer 3

50-60 gills with ciliated epithelium and gills that direct flow of water that ventilates

Question 4

polyplachophoran reproduction

Answer 4

gonochoric
external fertilization
trochophore larva

Question 5

gastropod head

Answer 5

abundance of sense organs

Question 6

limpets

Answer 6

foot is sucker to attach to subtrate

radula for scraping algae

Question 7

abalone

Answer 7

radula to feed on plant tissue

Question 8

moon snail

Answer 8

foot digs into sand and drills using radula

then sucks out food

Question 9

gastropod nervous system

Answer 9

streptoneurons (twisted)

Question 10

bivalve foot

Answer 10

adapted for digging

Question 11

bivalve muscles

Answer 11

adductor

Question 12

bivalve siphons

Answer 12

has sensory tentacles

Question 13

hemal system of bivalves

Answer 13

open

oxygenated blood from gills - atria- ventricles

Question 14

bivalve excretory

Answer 14

2 nephridia

urine released from nephirdopore

Question 15

bivalve digestion

Answer 15

ventral food grooves to transport food particles to mouth using ciliary beat 
filter feeder
sessile 
lateral compression of body
loss of radula

Question 16

bivalve respiration

Answer 16

siphon - ostia - exhalant chamber

Question 17

bivalve nervous

Answer 17

4 major ganglia

cerebral, pleural, pedal, visceral

Question 18

cephalopod head

Answer 18

10 appendages

Question 19

cephalodpod foot

Answer 19

funnel combined with head

suckered appendages

Question 20

cephalopod shell

Answer 20

dissapeared @ same time jawed fishes appeared

Question 21

cephalopod muscles

Answer 21

circular

funnel

Question 22

cephalopod gills

Answer 22

branchial heart supplies gills with unoxygenated blood

Question 23

cephalopod hemal

Answer 23

systemic heart

Question 24

cephalopod digestion

Answer 24

meet at 5 way function

stomach, intestine, gastric cecum, esophagus , diestive gland

Question 25

cephalopod nervous

Answer 25

ganglia all over body
stellate ganglia at tips of gills - giant axons
circumesophageal nerve ring- around esophagus