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Birds (Aves) are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweig...

Diversity of Vertebrates


Bilateral symmetry. 2. Two pairs of jointed locomotor appendages, which can ... The exception to this are the cartilaginous fish, because cartilage does not fossilize well, and the birds, due to the fact that they have ... jaws and paired appendages ... name implies continued tie to water - eggs must be laid in water or at least in ...

Diversity of Vertebrate Animals

www.marietta.edu/~biol/introlab/Vertebrate Diversity.pdf

as pets – fish, amphibians, reptiles, birds, and mammals. The biological ... Fish have paired appendages (fins) adapted for movement in water. • Protected skin.

Answer Key-The Molecular Connection - PBS


2. Compare the human amino acid sequence with each of these five animals by ... Paired appendages and spinal column: in all species except lamprey ... Write your answer in the hexagon below the arrow pointing to the name of that animal. ... Chickens and turkeys are both birds and have the same sequence of amino ...

Origin and Comparative Anatomy of the Pectoral Limb - NCBI


Feb 10, 2008 ... According to the lateral-fin theory, paired limbs are derived from ... Fig. 2. Formation of adult radial muscles from embryonic muscle buds, ... (Bottom) Names of corresponding parts of pelvic appendages are shown in parentheses. ... Elements of the girdle of the reptiles were modified in birds to permit flight.

Phylum Chordata: The Vertebrates


750 species; Have paired appendages; Many have acute senses; Sharks have a ... Over 8600 species & 20 orders of birds; Classified into 2 general groups ...

Chapter 48: Vertebrates


2. A flexible rod, the notochord, forms on the dorsal side of the primitive gut in the early .... The name vertebrate comes from the indi- ... great lines of terrestrial vertebrates, birds (descendants of .... Jawless fishes with no paired appendages;.

95.05.08: The Animal Kingdom


For example, amphibians, reptiles, and birds belong to the phylum Chordata. ... The scientific name assigned to animals without backbones is Invertebrata, ... which is divided into eight different classes: (1) class Aves (birds), (2) class Fish, .... Arthropods are characterized by their paired, jointed appendages, which are often ...

evolution - Why don't mammals have more than 4 limbs? - Biology ...


Sep 30, 2014 ... I guess that we would call something a pair of legs if it is constructed using a similar ..... reptiles, birds, and mammals), this pattern (2 sets of paired limbs) became .... Collaborator published paper on ArXiv without my name.

skeleton - The vertebrate skeleton | Britannica.com


The internal position of bones and their central position in limbs provide firm ... The paired fins are set horizontally in cartilaginous fish, which do not have a swim ... In the reptiles, birds, and mammals, a transition of the locomotory force from the ... (2) a deeper lateral mass, the myotome, which gives rise to the muscles, and ...

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Appendicular Skeleton


The appendicular skeleton includes the paired fins or limbs and the girdles, the ... General name, Forelimb, Hind limb ... Only three digits are present; these are most likely 1, 2, and 3, based on comparisons with Archaeopteryx, the first bird.

Comparative Vertebrate Anatomy - Lecture Notes 5


consists of pectoral & pelvic girdles plus skeleton of fins & limbs; Some vertebrates ... tetrapods with even vestiges of anterior limbs, e.g., turtles & birds & mammals ... Tetrapods - pair of cartilaginous plates form in embryos & each ossifies at 2 ...

Taxonomy List


**The species name always consists of the Genus name (Homo) ... worms, insects, fish, birds, humans. .... appendages, first 2 pair different from the rest.