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Lampreys
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What are the differences between jaw less fish and cartilaginous fish?
Jawless fish and cartilaginous fish have cartilaginous skeletons, and bony fish have skeletons made from bone. Cartilaginous fish and bony fish both have jaws, paired appendages, and whole vertebrae, and jawless fish lack jaws, paired appendages, and often are without whole vertebrae. Cartilaginous fish can have scales or be naked, jawless fish are naked, and bony fish have scales. Bony fish have swim bladders, and cartilaginous fish do not. Jawless fish, cartilaginous fish, and bony fish all have fins, gills, and dorsal nerve cords that lead to a distinct brain. They all also have postanal tails and notochords.
An example of a cartilaginous fish?
Cartilaginous fish such as sharks, skates, and rays are vertebrates, whose internal skeleton is made entirely of cartilage and contains no ossified bone. Cartilaginous fish are also known as Chondrichthyes and have one or two dorsal fins, a caudal fin, an anal fin, and ventral fins which are supported by girdles of the internal skeleton.
Among jawed fish you have your bony fish and your cartilaginous fish Which of these is one of the latter?
One example of a cartilaginous fish is the shark. Sharks have skeletons made of cartilage rather than bone, distinguishing them from bony fish, which have skeletons made of bone.
What group do jawless fish belong to?
Jawless fish belong to the group known as Agnatha. This group includes species such as lampreys and hagfish, which are characterized by the absence of jaws and paired fins. Agnatha is considered one of the most primitive classes of vertebrates, and these fish have a unique, elongated body structure and a cartilaginous skeleton.
What present in bony fish but not in cartilaginous fish?
Cartilaginous fish do not have true bones and belong to a the class Chondrichthyes. Sharks, rays and skates are the best-known of this class. True bony fish belong to the class Osteichthyes. One of the major differences is that the members of the class Chondrichthyes lack the ability to pump water past their gill plates, so they must constantly be on the move or in a fast moving current when they are at rest.
What can fishes with jaws do that fishes without jaws cant?
the fish that do have jaws can easily break ther food down into chunks and easily swallow it and one without jaws can do that
What are Cartilaginous?
Cartilaginous fish such as sharks, skates, and rays are vertebrates, whose internal skeleton is made entirely of cartilage and contains no ossified bone. Cartilaginous fish are also known as Chondrichthyes and have one or two dorsal fins, a caudal fin, an anal fin, and ventral fins which are supported by girdles of the internal skeleton.
Where did fish come from?
Fish do not come from one source or one event. Early fish were small, jawless species that are now extinct. The first fish with jaws were Placoderms.
Which pair of characteristics would you use to place a fish in one of the three fish classes agnatha cartilaginous fishes or bony fishes?
skin type
Using nostrils called nares what cartilaginous fish can detect as little as one part per million of blood in seawater?
Shark
How many phyla of fish are there?
Fish are general classified into one phylum which is known as chordata. There some fish like the hagfish that are not able to fit into this phyla properly.
What are the 4 main characteristics of fish?
Answer:There are two types of fish - bony fish, and cartilaginous fish. The main thing that sets bony fish apart from cartilaginous fish is the presence of a skeleton made of bone (a cartilaginous fish has a skeleton made out of - you guessed it - cartilage.)Bony fish also have a hard, bony plate, called an operculum, covering their gills. They may also have distinct rays, or spines, in their fins.Characteristics and Classification of Bony Fish:Some documents refer to the bony fish as the Osteichthyes, which used to be recognized as a class of organisms. Osteichthyes is still used commonly to refer to the two main types of bony fish:Ray-finned fishes, or ActinopterygiiLobe-finned fishes, or Sarcopterygii, which includes the coelacanths and lungfishes.Classification of Bony Fish:Kingdom: AnimaliaPhylum: ChordataClass: ActinopterygiiEvolution of Bony Fish:The first fish-like creatures appeared over 500 million years ago. Bony fish and cartilaginous fish diverged about 420 million years ago. Read More About Fish Evolution thaks for ABOUT.COM:) lm
