Why Does An Organism's Ancestry Follow A Pattern?

These slideshows helped me understand the four questions I asked during them. The first question was what do all life forms have in common?. The second question I am asking myself while I watch the presentations is why does Earth contain such diverse life forms?. Third question is what does tracing an organism’s ancestry tell us about it?. My fourth and final question is does evolution follow a pattern?. These questions will be answered in each slideshow in their own way.

The first presentation had a central question which was are birds considered dinosaurs?. They answered it very thoroughly. They answered my first question with an example how birds are like dinosaurs they come from the same ancestor. The next questions answer was why earth contains such diverse life forms but they answered it by explaining how birds and dinosaucers are related by their ancestors are the same. The other question was what does tracing an organism’s ancestry tell us about it?, answer for this was how they explained that their were types dinosaucers that were classified as

Their answer for question one was that two animals a dog and whale were both related but they split and became what they are today. The answer for question two is that these two diverse creations come from the same ancestors but they split up into two different species. Question threes answer is that tracing the dogs and whales ancestory can tell us how they were once the same thing and how identical they were in body parts like how the whale is not needing the pelvic bone but the dog does and knowing this the scientist think that the whale species and dog species are connected. The last question's answer is that with these two species evolution does not follow a pattern in this case because theses two different species evolved and split into two different animals that are today. All in all this slideshow answered the