Chordate

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    The Evolution Of Chordates

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    Chordates, which is the phylum or classification of fish and mammals of the sea, are the most developed marine organisms. Scientists believe that Chordates originated about 590 million years ago. The original organisms of the Chordata phylum are believed to have lacked skeletal structures, and therefore, left a very undetermined fossil record. The vertebrate fossil record begins approximately 400 million years ago. Early Chordates were tunicates, marine organisms that would frequently form large colonies through asexual reproduction, a process of reproduction where an organism does not need a partner in order to achieve fertilization. Eventually, lancelets evolved from tunicates with a more developed brain, along with gills that opened…

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    Zaglossus Bruijni Essay

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    2009) This means names of species names may change due to genetic information showing how close or how far apart certain species are. ( Science,2009). Kingdom Animalia Phylum Chordata Class Mammalia Order Monotremes Family Tachyglossidae Genus Zaglossus Kingdom - Animalia Every animal comes under the kingdom of Animalia which is also known as Metoza. The animal cells miss a wall which the plant cells have, In comparison to plants and organisms, animals have the ability to perform…

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    Evolution Of Dogs

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    animal to the tail and is the major nerve cord of nerve fibers. The notochord is present in all chordate embryos and runs beneath the dorsal nerve cord, which is another key feature of chordates. Pharyngeal gill slits are the openings between the pharynx and the outside. They resemble gill slits and are on present for a short amount of time in the embryonic stages of the tetrapod development. Finally the post-anal tail which extends behind and above the anus. All chordates have a post-anal tail…

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    The notochord is the defining structure of the chordates, and has essential roles in vertebrate development. It is a flexible, rod-shaped structure that is in the embryonic stage of all chordates. It gives the skeletal support and is found in between the digestive tube and nerve cord. In some animal chordates lifetimes it is the main axial support in the body. The dorsal hollow nerve cord is the only feature unique to all chordates. It is located at the top of the animal, above the notochord.…

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    Chordates Research Paper

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    The Chordata is the third largest phylum in the kingdom Animalia. Chordates are bilaterally symmetrical; meaning one half of their body is a reflection of the other half. The Chordata phylum has several general characteristics unique to only this organization of creatures. The first is pharyngeal slits, which are openings behind the head that connect to the throat. These are known as gills in some chordates. Humans have these in the womb but eventually form into the inner ear. The second feature…

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    Nt1310 Unit 2 Assignment

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    Your name: Matthew King Date: October 16, 2015 Your section: 001 1. Complete Classification: (ITIS: 2014 ) Common Name: Two-toed Amphiuma Kingdom: Animalia Phylum: Chordata Class: Amphibia Order: Caudata Family: Amphiumidae Genus: Amphiuma Species (G. s.e.): Amphiuma means Species information 2a. Description and identification Family: The family Amphiumidae consists of three separate species of “eel” like animals separated by the number of toes that are present on the animal.…

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    Tuatara Research Paper

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    Taxonomy Kingdom Animalia Phylum Chordata Class Reptilia Superorder Lepidosauria Order Rhynchocephalia Suborder Sphenodontia Family Sphenodontidae Sub-family Sphenodontinae Genus Sphenodon Species puctatus The taxonomy of the tuataraas has changed quite a bit over the years because of the knowledge gained about these creatures. Currently, only one living species of tuatara is recognized and they are classified in the order Rynchocephalia or Sphenodontia. Tuatara are most commonly classified as…

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    Perissodactyla Essay

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    My order is Perissodactyla, which is also known as odd toed ungulates. The order Perissodactyla consists of the animals’ horses rhinoceros, zebras, tapirs, and donkeys. The name of their order comes from the fact that they have a larger middle toe. Most species have three digits on the hindfoot, three or four on the front feet but, some only a single digit. Some species have horns, but these are relating to the skin without bony cores, located on the nasals or frontline in the midline of the…

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    The chondrichthyes are a group of vertebrates, which contain the sharks, skates, rays and chimaeras, whose internal skeleton is fabricated entirely of cartilage and contains little to no ossification. The organisms in chondrichthyes are colloquially termed “the cartilaginous fishes”. Cartilaginous fish are divided into two subclasses based on a number of characteristics. The first is the Elasmobranchs, which are well known organisms because of their formidable reputations. Organisms in this…

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    Middle school is like a big, deep, blue ocean with a clown fish, a sunfish, a box jellyfish, a stone fish, a lionfish, a octopus, a turtle, a seahorse, a squid, a eel, a stingray, a sea cucumber , and a dolphin. The clownfish is Jacob because he is the class clown. The sunfish is Paige because sometimes if someone gets to close to her, she will bit. The box jellyfish is Kaleb because he is such a pain in the butt that he leaves scars wherever he goes. The stonefish is Cameron because he…

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