osteichthyes

Question 1

habitat

Answer 1

marine and freshwater

Question 2

developement and fertilisation

Answer 2

direct and external and are oviparous

Question 3

are they warm blooded

Answer 3

they are too poikiltherms ie cold blooded animals

Question 4

body structure

Answer 4

they have bony endoskeleton, and streamlined bodyand their mouth is terminal, they have presence of operculum and they have ctenoid/ cycloid scales

Question 5

how is buoyancy maintained

Answer 5

they have airbladders present

Question 6

how many chambered heart do they have

Answer 6

its 2 chambered one auricle and one ventricle

Question 7

examples

Answer 7

exocoetus [flying fish], catla [katla], hippocampus [ sea horse], labeo[ rohu] , clarias [magur], betta [ fighting fish], pterophyllum [angel fish]