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Fish, Amphibians,
Question | Answer |
---|---|
NOTOCHORD | a flexible cord that supports a chordates back |
characteristics of a CHORDATES? | all chordates have a nerve cord in back, slits in throat area, and a notochord |
major characteristic of VERTEBRATES | all have a backbone that is part of an endoskeleton |
vertebrae/vertabra | small similiar bones that form the back bone of vertebrates |
ECTOTHERMS | animal that does not produce internal heat;body temperature depends on its environment |
ENDOTHERMS | animals that can produce and regulate its body temperature |
Endothermic examples | mammals and birds- horses, bears, beavers, walrus, eagles, egrets, owls |
Ectothermic examples | reptiles and amphibians- snakes, lizards, frogs, salamanders, turtles |
characteristics of a fish | lives underwater,uses fins to move, has scales, gets oxygen through use of gills |
reprdoduction of fish | external fertilization |