Biogeography In Biology

Most fossils are found within layers of sedimentary rocks called strata. Deeper strata are usually older and therefore fossils from different time period can be compared. Analysis of fossils from different strata suggests that more complex, modern organisms evolved from simpler, more ancient organisms.Imprint fossils are one example of fossils that died and been buried and the sediments get preserved. Biogeography is the study of species distributions. It examines how species have been distributed across different places at different times.The distribution of species shows a clear pattern. More similar species tend to be found closer to one another geographically. The distribution of many animals and plants across different continents can be explained by continental drift sometimes the movement tectonic plates.Example of biogeography is galapagos finches by charles darwin. Homologous Structure are anatomical features that are derived from a common ancestor but have been adapted to a different purpose.Comparing the body structures of different species also supports the notion of a common ancestor. Closely related species have more anatomical …show more content…
Many species develop into much larger, more complex organisms after conception. If we compare the embryos of animals as they develop, you can often find they are much more similar than their fully developed counterparts. Many of the anatomical differences between species only arise during our embryonic development. Different species often start with the same basic tissues or structures but they develop differently and are used into different structures as the organism develops.Examples are fish embryos and human embryos both have gill slits. In fish they develop into gills, but in humans they disappear before