Amphibian
From CreationWiki, the encyclopedia of creation science
| Amphibian |
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Subclass Lissamphibia
Subclass Lepospondyli (extinct) |
Amphibians make up a taxonomic Class of vertebrates that are not amniotes (do not reproduce by eggs with shells or by placenta). Amphibians lay jelly like eggs in water that develop into aquatic larvae called tadpoles. For this reason, even dry land toads must have a source of semipermanent water nearby. The Class includes frogs, toads and salamanders. Some fossil specimens, such as temnospondys, have been included within the Class, though experts now question the validity of a few of these classifications.
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Anatomy
Frogs can breathe through their skin.
Reproduction
Amphibians reproduce by jellylike eggs that transform into tadpoles with gills who swim for a while then metamorphosize into adults who generally leave the water to live on land. Many tropical rain forest frogs lay eggs in which tadpoles develop inside the egg but hatch as completely formed miniature adults.
Ecology
Difficulties for Evolution
Normally, Evolutionists presume amphibians are the half way point between fish and reptiles, as animals learned to crawl out of the sea. There are many difficulties with demonstrating this by fossils. Also, the metamorphosis from swimming tadpole to adult frog is very complex, and makes it difficult to explain how a dry land animal developed by step by step evolution. Similarly, it is difficult to see exactly how a fish would develop into a creature that only has lungs as an adult.
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Related References
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