10FROGS: Need to live near water Have 2 bulging eyes Strong, long, webbed hind feet that are adapted for leaping and swimmingStrong and slimy skin (like very moist environments)Will take long jumpsLike to lay eggs in clustersFound on every continent except AntarcticaMore than 400 speciesHave a lot of PREDATORS
11TOADS Can live further away from water Lower, football-shaped eyes Stubby bodies with short hind legs (for walking instead of hopping)Warty and drier skinLay eggs in long chainsWill run or take small hopsCan be found worldwide except for Madagascar, the polar regions, and PolynesiaMore than 300 speciesDo NOT have a lot of predators
12Amphibian Reproduction Salamanders – eggs are fertilized internallyFrogs and toads –eggs are fertilized externallyFor all amphibians, Fertilized eggs develop in waterWhat is special about amphibian eggs is that they have a protective jelly that coats the egg
20Stage 5: Front legs develop but frog still has tail
21Stage 6: Frog loses tail and becomes a mature adult
22Amphibians: ADAPTATIONS What is an adaptation?Once amphibians are adults, what new adaptations do they need to live on land?
23Adaptation 1: OXYGENWhile amphibians are larvae, (exampletadpoles), how do they breathe?
24Once, they are on land, how do they breathe? Amphibians must get oxygen from the AIR instead of the water once they are on landDuring metamorphoses, amphibians lose their gills and develop LUNGS.What two gases are exchanged through the lungs?OXYGEN and CARBON DIOXIDE