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the phylum whose members have a notochord, a nerve chord, and pouches in their throat area at some point in their lives
an animal whose body regulates its own temperature by controlling the internal heat it produces
an animal whose body does not produce much internal heat. Its body temperature changes depending on the temperature of its environment
a vertebrate that lives in water and uses fins to move. They are ectotherms, obtain oxygen through gills and have scales
an internal, gas filled sac that helps the fish stay stable at different depths in the water
a vertebrate that is ectothermic and spends its early life in water and its adult life on land
an organ found in air-breathing vertebrates that exchanges oxygen and carbon dioxide with the blood
the specific environment that provides the things an organism needs to live, grow and reproduce
a scientist who studies extinct organisms, examines fossil structure, and makes comparisons to present-day organisms
fish that have jaws and scales, and skeletons made of cartilage. ex. sharks, rays and skates
fish that have jaws, scales, a pocket on each side of the head that holds gills, and a skeleton made of hard bones. ex. trout, tuna, gold fish
lizzard and snakes
reptiles that have skin covered with overlapping scales, as they grow they shed their skin and scales. Most live in warm areas
are large carnivorous reptiles that care for their young and have broad, rounded snouts with only a few visible teeth when their mouth is shut
are large carnivorous reptiles that care for their young and have pointed snouts, with most of their teeth showing when their mouth is shut.
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