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What kind of fish are most ancient?

Jawless Entelognathus primordialis is the most ancient fish.


What kind of fish is a lampery?

The Lamprey is an eel-like shaped, jawless fish of the order Petromyzontiformes.


What kind of nervous are in the upward tract?

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Lampreys and hagfishes are examples of what kind of fishes members of the class Agnatha?

Bony fishHag fishLamprey(both of these are known as the jawless fish)Sharks and rays(both of these are known as cartilaginous fish)Lob-finned fishThis is a very simplified classification of something that is very complex. To see the full tree, try WikiSpieces.


What kind of prehistoric animals are ostracoderms?

They were jawless fish that lived during the Paleozoic era Stunningly some of our oldest ancestors came from ostracoderms!


What kind of nervous system do oysters have?

They don't have a central nervous system. Just 2 ganglia.


What kind of skeleton does a jawless fish have?

Agnathans are the jawless fish. They are usually fairly small (a few centimeters in length.) They consist of lancelets and tunicates. They have a notochord which is like a backbone, but it is more flexible than bone. Tunicates are enveloped by a tough tunic around their bodies. Other than that, they have no other bones.


What kind of Eye muscles are controlled by the autonomic nervous system?

intrinsic eye muscles are controlled by the autonomic nervous system


What kind of nervous system does a tiger have?

central


Are lungfish carnivores?

Both jawless fish and cartilaginous fish have skeletons composed of cartilage and distinct brains. Also, some cartilaginous fish don't have scales, and all jawless fish don't have scales. Cartilaginous fish, however, have jaws, paired appendages, and a kind of vertebrae. Jawless fish do not have jaws, paired appendages, and often are without vertebrae.


What kind of nervous system does the Bengal tiger have?

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What kind of cells are found in the nervous system?

The nervous system is made of these kinds of cells... -smooth muscle cells -nerve cells