Lab 3 Activity Sheet

Question 1

Bivalvia symmetry

Answer 1

bilateral

Question 2

Bivalvia feeding adaptations

Answer 2

gills adapted to filter for food

Question 3

Bivalvia locomotion

Answer 3

retractable “foot” that protrudes from the shell

Question 4

Bivalvia predator defense

Answer 4

adductor muscles to keep it closed. hard shell

Question 5

Bivalvia skeleton

Answer 5

mineralized skeleton

Question 6

Bivalvia circulatory system

Answer 6

open

Question 7

Gastropoda (snail) symmetry

Answer 7

bilateral. distorted by torsion

Question 8

Gastropoda feeding

Answer 8

radula rasps

Question 9

Gastropoda movement

Answer 9

contraction waves from posterior to anterior of gliding portion of foot

Question 10

Gastropoda predator defense

Answer 10

Hard exoskeleton. Head can retract into shell. Mucus smells and tastes bad

Question 11

Gastropoda skeleton

Answer 11

shell and hard exoskeleton. protection and muscle attachment

Question 12

Gastropoda circulatory system

Answer 12

open

Question 13

Cephalopoda symmetry

Answer 13

bilateral

Question 14

Cephalopoda feeding

Answer 14

tentacles grab prey
arms bring prey to beak
beak acts like jaw
radula scrapes and cuts foods

Question 15

Cephalopoda movement

Answer 15

jet propulsion (mantle fills with water and water is expelled by siphon) fins and arms and direction of siphon help with direction

Question 16

Cephalopoda predator defense

Answer 16

chromatophores and ink pouch

Question 17

Cephalopoda skeleton

Answer 17

pen is hard internal structure used for stability in squid

Question 18

Cephalopoda circulatory system

Answer 18

closed