Bio animals
1.) Chordates are animals that posses a notochord, a hollow dorsal nerve cord, and pharyngeal slits at some point in its development.2.) Vertebrates have a backbone, an endoskeleton, or skeleton on the inside of the body, a large brain in a skull, a large brain in a skull, an advanced nervous system. A complex heart and circulatory system, a special kind of outer covering, one or two pairs of appendages.3.) The five classes of a vertebrate are the fish, amphibian, reptile, bird, and mammal classes.4.) Lampreys are parasites. They have a circular mouth with teeth on their tongues, which they use to attach themselves to another fish's body. When they attach to the fishes(host) they scrap away at the skin with their large teeth and a strong, rasping tongue. They then suck up the tissues and the body fluids of the fish(host). They are not true fishes because they have no bones what so ever. They are the only vertebrates that do not have backbone as adults.5.) Sharks are not true fish because they do not have scales or bones in their skeleton. The also do not have a flap of skin covering their gills as some other fishes do. Sharks just have five to seven rows of slits.6.) Cartilage is a tough tissue that bends easily.
) Some characteristics of birds are covered with feathers, wings for flying, light hollow bones, four-chambered heart, warm-blooded, external development of eggs, two legs for support and balance, mouth in shape of beak. Some characteristics of true fish are skeleton of bones covered with scales, fins for swimming, gills for breathing, two-chambered heart, cold-blooded. ) Primates are the most highly developed animals because they have been able to construct and use tools to build and change their environment. ) Some amphibians are frogs, toads, salamanders, and the newts. Birds also have large and powerful breast muscles to move their wings in flight. ) A placenta is a bag inside the mother in which the baby grows and develops. When they become an adult they breathe through lungs. They also have a two-chambered heart, and two legs.
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Acceptance Essays
