Problems with coming onto land for part of your life: Dessication Need to process oxygen through lungs rather than gills - the amphibians evolved from lung fish Limitation to being an amphibian: Need to go back to water to reproduce and for larval stage - eggs are too fragile to survive in terrestrial environment So the amphibians evolve and one "limb" becomes: 3) the reptiles - upper Paleozoic Important advance - another classic example of theory of evolution: The amniote egg - bypasses the need for a larval stage in water!!
(larval stage - eggs; to survive; L:in terrestrial environment; So the amphibians evolve and one "limb) (the amphibians; evolved; from lung fish Limitation; to being an amphibian) (larval stage - eggs; are; too fragile to survive in terrestrial environment)
larval stage - eggs the amphibians larval stage - eggs
to survive evolved are
L:in terrestrial environment So the amphibians evolve and one "limb
from lung fish Limitation to being an amphibian
too fragile to survive in terrestrial environment