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What are three main groups of fishes?
Class Agnatha
How do agnatha animals breathe?
through holes in there body. who knows what ones... probably all of them....
How do the agnatha breathe?
they have seven gills made of cartilage which are attached onto modified lungs
Are Lampreys and hagfishes are examples of what kind of fishes members of the class Agnatha?
jawless fishes
What order is jawless fish in?
Jawless fish are the oldest group of fish, belonging to the class Agnatha. Within this class, they are further divided into two orders: the Petromyzontiformes (lampreys) and the Myxiniformes (hagfish).
Do fish have keratin?
Fishes of class AGNATHA (myxini) have tooth-like structures that are composed of KERATIN..
Why are fish from the class Agnatha considered primitive?
Agnatha means 'no jaws', and they really don't have jaws, although they do have teeth. They also have no stomach, and no boney skeleton. Their skeleton is cartilagineous, like the elasmobranchs.
How many classes come under the subphylum Vertebrata?
Class Agnatha (jawless fish)Class Chondrichthyes (cartilaginous fishes)Class Osteichthyes (bony fishes)Class Amphibia (amphibians)Class Reptilia (reptiles)Class Aves (birds)Class Mammalia (mammals)
What is the class of a vertebrates that breathe through their lungs and their skin?
how do birds breathe
Which class of chordates are jawless fish?
In Phylum Chordata, jawless fish are grouped within Superclass Agnatha. Examples of jawless fish include lampreys and hagfish, which combined total about 120 different species.
Is a trout a jawless fish?
No, trout are not jawless fish. They belong to the class Osteichthyes, which includes jawed fish with bony skeletons. Jawless fish belong to the class Agnatha, which includes animals like lampreys and hagfish.
Which class of fishes does a lamprey belong?
Lampreys are in the superclass Agnatha, jawless fish. They are of the class Cyclostomata, which includes hagfish, as opposed to the extinct Ostracoderms.
