Thursday, April 28, 2011

Analogy and Homology

Lizard
Turtle
The lizard, turtle and salamander have tails but the two species that 
posses the same homologous trait are the lizard and turtle. Even though  lizards and turtles are both reptiles, they look different. Most people are not aware that turtles have tails because they tend to hide it. Dinosaurs are said to be common ancestors of reptiles and they also had similar traits,like the tail. 
Salamander

The salamander's tail is analogous trait to the lizard and turtle's tail because it is an amphibian. One common ancestor for an amphibian who possesed a tail was a Labyrinthodontia.

Labyrinthodntia