| A | B |
|---|
| AMPHIBIAN | A vertebrate that lives in the water when young but lives on land as an adult. |
| BIRD | warm blooded; covered with feathers |
| BONY FISH | largest class of fish; bony skeleton; perch is example |
| CARTILAGE FISH | cartilage skeleton; paired fins; shark example |
| CONTOUR FEATHER | stream-lined shape for flight |
| DOWN FEATHER | keeps birds warm |
| ENDOSKELETON | skeleton inside body |
| EXTERNAL FERTILIZATION | joining of sperm and egg outside female's body |
| FINS | winglike structures in fish |
| FISH | cold-blooded; has fins and gills |
| GILLS | organ in fish to absorb oxygen from water |
| HIBERNATION | period of inactivity during winter months |
| INCUBATION | warming of an egg until embryo grows |
| INTERNAL FERTILIZATION | joining of egg and sperm inside female's body |
| JAWLESS FISH | cartilage skeleton; no jaws or paired fins |
| MAMMAL | warm-blooded; has hair or fur; feed young milk |
| MAMMARLY GLANDS | structure that secretes milk |
| MARSUPIAL | pouched mammal |
| METAMORPHOSIS | distinct changes in form from egg to adult |
| MIGRATION | seasonal movement of animals |
| MONOTREME | egg laying mammal |
| PLACENTAL MAMMAL | mammal whose young are nourished by a placenta |
| REPTILE | cold-blooded; dry scaly skin |
| SCALES | overlapping flat plates on a fish's body |
| VERTEBRATE | animal with a backbone |
| LATERAL LINE | layer of cells in fish that detect vibration |
| COLD-BLOODED | body temp. changes with surroundings |
| WARM-BLOODED | body temp. constant |
| MR. S. | o.k. science teacher |
| MR. VOGT | bestest science teacher |
