Vertebrates are characterized by the presence of a vertebra or backbone; a skull; skeletal bones that form an endoskeleton; a bilaterally symmetrical structure; and two pairs of appendages, such as fins, limbs or wings. ... More »

The primary difference between vertebrates and invertebrates is the presence of a backbone or spinal column, which vertebrates have and invertebrates do not. Examples of vertebrates are humans, dogs, cats and birds. Exam... More »

Aves, the Latin word for birds, is a class of warm-blooded, toothless, feathered, winged vertebrates with horny beaks that are characterized by a number of features that facilitate flight. The Aves' high metabolic rate, ... More »

Characteristics common to all vertebrates include bilateral symmetry, two pairs of jointed appendages, outer covering of protective cellular skin, metamerism, developed coeloms and internal skeletons, developed brains, v... More »

A dichotomous key for sharks may include body shape, presence of a pelvic fin, number of gill slits or dorsal fins, mouth position, head shape, length of dorsal fin or caudal fin, presence of an anal fin, hornlike append... More »

www.reference.com Pets & Animals Marine Life Sharks

The primary difference between vertebrates and invertebrates is the presence of a backbone or spinal column, which vertebrates have and invertebrates do not. Examples of vertebrates are humans, dogs, cats and birds. Exam... More »

Animals that have an internal skeleton made up of bones are classified as vertebrates. Some examples of animals that fall into the category of vertebrates are humans, bears, frogs and birds. More »

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