Question

name the class of chordate
that has
operculam,air bladdee and external fertilizers
no neck smooth skin with mucous gland
sceretes no external earsand oviporous
placoid seales,no external ears and oviparous​

Answer 1

Answer:

Pisces is the answer. Please mark this as the brainliest

Answer 2

Class of chordate that has operculum ,air bladders and external fertilizers with no neck and having smooth skin, mucous gland secretions, no external earsand, oviparous ,placoid scales with no external ears  this characters belongs to class osteichthyes.

Explanation:

• Bony endoskeleton ,exoskeleton comprises of cycloid ,ctenoid or ganoid scales (mesodermal in origin).
• Mouth is terminal ,external nares are present to dorsal  head .

• posses caudal fin (homocercal), four pairs of gills (covered by operculum) and swim bladder is present.

• These are ammonotelic or ureotelic with ophisthonephric kidneys
• Electric organs are absent . These are mostly oviparous eg labeo (rohu), clarias (magur), pterophyllum (angel fish) betta ( fighting fish ),catla (katla), and exocoetus (flying fishes)