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What first evolved during the Ordovician period?
During the Ordovician period, the first land plants evolved, as well as the first jawless fish, jawed fish, and arthropods like trilobites. This period also saw the emergence of the first coral reefs.
Which was the first organism with a vertebra?
The first vertebrates (as far as is known) were a group of extinct*, jawless, heavily-armored fishes called Ostracaderms. *There are a few zoologists who feel that the hagfish and possibly the lamprey and slime hag are ostracaderms, but I disagree. I'm not at all sure that the hagfish and slime hag are true vertebrates.
Are shrimp considered fish in the classification of aquatic animals?
No, shrimp are not considered fish in the classification of aquatic animals. Shrimp belong to the crustacean group, while fish belong to the group of vertebrates.
Is shrimp considered a type of fish?
No, shrimp are not considered a type of fish. Shrimp belong to a different group of animals called crustaceans, while fish belong to the group of animals known as vertebrates.
What is a type of filteration?
Jawless fish are filter-feeders.
What is the scientific name of a jawless fish?
Jawless fish are Phylum Chordata, they are also known as paraphyletic, they still are around today.
The most primitive vertebrates are members of the group of a jawless fishes b amphibians c artilaginous fish d birds e bony fish?
A: jawless fish
What is jawless fish?
An example of a jawless fish is the adult lamprey. The lamprey (scientific name : Agnatha) has a toothed, funnel-like sucking mouth.
Is a clown fish a jawless fish?
Clown fish do have jaws, so they are not a jawless fish.
Give you some example of jawless fish?
Most fish are not jawless. There is a small group of very primitive fish called Jawless fish (Agnatha). However, they make up a very small proportion (<1%) of the fish species on earth. Jawless fish are things like lamprey and hagfish. All other fish, like trout, salmon, tuna, sharks, rays, cichlids, goldfish, etc, etc, have jaws. See the related link for more information on the primitive jawless fish.
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.
Do jawless fish have unpaired fins?
yes, jawless fish have no paired fins
What is the skeletal type to jawless fish?
Jawless fish have an internal cartelagenous endoskeleton.
How do jawless fish breathe?
Jawless fish breathe from gills.
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).
Is a Hagfish a fish?
No, they are jawless fish.
Like jawless fish cartilaginous fish have sketetons made of?
Both jawless fish and cartilaginous fish have skeletons made of cartilage.
