Show:
Mollusks
fish
Birds
100
What is a common example of a Gastropod?
Snail or slug
100
What do gills do?
Get oxygen from the water
100
Birds bones are What?
Hollow
200
what do snails use to eat?
a radula
200
Do sharks have bones?
No
200
What do down feathers do?
Keep birds warm
300
What is a bivalve?
Mollusks with two shells
300
What is the function of a swim bladder?
To stablize at different depths
300
How many heart chambers does a bird have?
Four
400
What do most water dwelling mollusks have?
Gills
400
Jawless fish have what type of skeliton?
A cartilage skeliton
400
Air sacs do what?
Give more oxygen
500
Howo cephalopods swim?
jet purpultion
500
Are fish endotherms or ectotherms?
Ectotherms
500
Scientists believe birds may be the decedants of what?
Dinosoars