Anatomical Features

     Anatomical Features is of or relating to the structure of the body. Similarities of Anatomical Features between different kind of organisms Strongly support the theory of common descent. Porpoises, for example, live like large predatory fish, but they resemble to fish. Like all placental mammals, porpoises have lungs and simple jawbones and gestate their young internally. The simplest explanation for these similarities with cats, dogs, and primates is that porpoises are closer related to other mammals than they are to the fish they live among.

     So you know, “fish” like dolphins and porpoises, are called placental mammals. Another example of analogous anatomy across species is the tetrapod limb. The basic form of this structure is a single long bone attached to a shoulder at one end and an elbow at the other. Below the elbow, two small bones are extended to a wrist, it terminated in small bones for toes and fingers. This structure is universal among reptiles, amphibians, mammals. It is unknown among invertebrates.  

Fossils provide solid evidence that organisms from past are not the same as fossils found today. They show a progression of evolution. Scientists calculate the age of fossils a categorize them to determine when organisms lived relative to each other. These are some facts and examples about anatomical features.