the axial and limb skeletons increased their hardness by increasing the amount of calcification the pectoral and pelvic girdles evolved to support movement of the limbs and the weight of animal with no help from water buoyancy preventing eggs from drying out (dehydration) eggs are mostly laid in water early development takes place in aqueous environment tadpole or larvae feed and grow in water then metamorphose into an adult body form the tadpole and larvae have gills for respiration which are usually lost and replaced by a functioning lung after metamorphosis fertilization is external in frogs and internal in salamanders eggs are laid in vegetation or rocks and they stick there due to a thick, sticky jelly coating amphibians that are more terrestrial, lay their eggs in very moist burrows or under rotting logs and leaves where the jelly coat protects from desiccation sensory organs changed lateral line system degenerated because it is ineffective in air development of ears for sensing vibrations in air rather that water expansion of the olfactory epithelium in conjunction with development of internal respiration system and nasal passages greater surface areas for olfactory receptors allows for detecting more diffuse chemicals in air Class Amphibia order Gynmophiona - caecilians snake-like in appearance all species live in tropical areas like S.
(the axial and limb skeletons; increased; their hardness; by increasing the amount of calcification) (eggs; from drying out; dehydration) (the tadpole and larvae; have; gills for respiration which are usually lost and replaced by a functioning lung) (metamorphosis fertilization; is; external in frogs) (sensory organs; changed; lateral line system; because it is ineffective in air development of ears for sensing vibrations in air rather that water expansion of the olfactory epithelium in conjunction with development of internal respiration system and nasal passages greater surface areas for olfactory receptors allows for detecting more diffuse chemicals in air Class Amphibia order Gynmophiona - caecilians snake-like in appearance all species live in tropical areas like S.) (eggs; are mostly laid; in water early development) (desiccation; degenerated; because it is ineffective in air development of ears for sensing vibrations in air rather that water expansion of the olfactory epithelium in conjunction with development of internal respiration system and nasal passages greater surface areas for olfactory receptors allows for detecting more diffuse chemicals in air Class Amphibia order Gynmophiona - caecilians snake-like in appearance all species live in tropical areas like S.) (the amount of calcification; evolved; to support movement of the limbs and the weight of animal with no help from water buoyancy) (a thick, sticky jelly coating amphibians; are; more terrestrial) (it; is; ineffective in air development of ears for sensing vibrations in air) (gills for respiration; replaced; by a functioning lung) (the pectoral and pelvic girdles; to support; movement of the limbs and the weight of animal) (they; stick; L:there) (gills for respiration; are lost; T:usually) (the jelly coat; protects; from desiccation sensory organs changed lateral line system degenerated because it is ineffective in air development of ears for sensing vibrations in air rather that water expansion of the olfactory epithelium in conjunction with development of internal respiration system and nasal passages greater surface areas for olfactory receptors allows for detecting more diffuse chemicals in air Class Amphibia order Gynmophiona - caecilians snake-like in appearance)
the axial and limb skeletons eggs the tadpole and larvae metamorphosis fertilization sensory organs eggs desiccation the amount of calcification a thick, sticky jelly coating amphibians it gills for respiration the pectoral and pelvic girdles they gills for respiration the jelly coat
increased from drying out have is changed are mostly laid degenerated evolved are is replaced to support stick are lost protects
their hardness by increasing the amount of calcification
dehydration
gills for respiration which are usually lost and replaced by a functioning lung
external in frogs
lateral line system because it is ineffective in air development of ears for sensing vibrations in air rather that water expansion of the olfactory epithelium in conjunction with development of internal respiration system and nasal passages greater surface areas for olfactory receptors allows for detecting more diffuse chemicals in air Class Amphibia order Gynmophiona - caecilians snake-like in appearance all species live in tropical areas like S.
in water early development
because it is ineffective in air development of ears for sensing vibrations in air rather that water expansion of the olfactory epithelium in conjunction with development of internal respiration system and nasal passages greater surface areas for olfactory receptors allows for detecting more diffuse chemicals in air Class Amphibia order Gynmophiona - caecilians snake-like in appearance all species live in tropical areas like S.
to support movement of the limbs and the weight of animal with no help from water buoyancy
more terrestrial
ineffective in air development of ears for sensing vibrations in air
by a functioning lung
movement of the limbs and the weight of animal
L:there
T:usually
from desiccation sensory organs changed lateral line system degenerated because it is ineffective in air development of ears for sensing vibrations in air rather that water expansion of the olfactory epithelium in conjunction with development of internal respiration system and nasal passages greater surface areas for olfactory receptors allows for detecting more diffuse chemicals in air Class Amphibia order Gynmophiona - caecilians snake-like in appearance