osteichthyes

Question 1

common name, examples

Answer 1

bony fish
- any fish
- ray finned, lobe finned

Question 2

skeleton

Answer 2

stiff bone, reinforced by calcium salts

Question 3

describe smell and sight

Answer 3

• good smell
• acute eyesight

Question 4

Adaptations to remain buoyant

Answer 4

• swim bladder
• operculum covering gills, able to breathe without swimming
• pectoral, pelvic and dorsal fins as stabilizer

Question 5

Reproduction

Answer 5

• external fert: eggs released to water
• external development

Question 6

describe their heart/circulatory sustem

Answer 6

two chambered tubular heart, atrium and ventricle
- closed, high pressure

Question 7

other features

Answer 7

• paired fins
• discrete muscle blocks (MYOMERES)
• teeth
• dermal scales
• numerous vertebrae

Question 8

ray finned fish

Answer 8

thin, flexible, skeletal rays

Question 9

lobe finned fish

Answer 9

muscular fins, supported by bones (only 1 species)