What are different types of embryology

9. Evidence of Evolution

The observation that fossils that do not resemble those of today are found in older strata and the fact that they are fossilized Transitional forms between different species speaks for the theory of evolution.
The Distribution of living things on earth can be traced back to the movement of the continents (continental drift theory) and the gradual change of species on the continents separated from each other (e.g. marsupials in Australia).
Homologous organ structures prove the common ancestry of groups of animals.
The basic biogenetic law is further evidence of the evolution of living things. The natural scientist Ernst Haeckel recognized that the early embryonic stages of various vertebrates (e.g. turtles, birds, dogs) are largely similar and only develop apart in the course of further embryonic development. From this he derived the basic biogenetic law: The embryonic development of an organism partly corresponds to a short version of the phylogenetic development of the species in question.
This means that the human being goes through stages during his development in the womb that the species has gone through. I. E. the embryo also creates gill slits like the vertebrate ancestor, the lancet fish. He also later puts on a tail, like the ancestor of all mammals. Even marine mammals put on embryonic gills, but these are regressed again; the adult animals have to go to the surface of the water to breathe.
It turns out that there are also biochemical homologies. Basic molecules such as ATP, DNA, RNA etc. are the same or similar in all organisms. One can recognize kinship structures through biochemical comparisons as well as through anatomical comparisons
are organs that have become functionless in the course of evolution. In humans z. B. the tailbone, wisdom teeth or the muscle that moves the auricle (only present in some people).
are called spontaneously recurring organs that have been lost in the course of evolution. In contrast to rudiments, atavisms occur only very rarely. In humans, these are special neck fistulas as remains of gill slits, additional nipples or webbed feet.
There are many phenomena in nature that can be explained very well, among other things by the work of evolution.
Ruso, Bernhart. 2011. BIOLOGY. Script. Vienna: Dr. Roland GmbH, 2011. 3rd edition
Figure 1: http://www.merke.ch/biografien/biologen/baer_embryos.php (July 20, 2016)