Evolution

Evolution

For years scientists have been studying evolution and common decent. From
Darwin to the modern day scientists humans have been trying to find out about how
the world has evolved. Even with modern day technology scientists have trouble
finding out how evolution works. Common descent can be proved in multiple ways.
Scientists use fossils, embryology, comparative anatomy, biogeography, and
biochemistry to give evidence that common descent has occurred.
One of the most obvious ways to study extinct animals is to take a look at
fossils. People can look at fossils and see how the animals looked in the past. These
fossils provide scientists with a record of ancient life. There are 2 kinds of fossils
there are fossils of animals that have become extinct and animals that have
undergone little change. By looking at these fossils you can see animals that look half
like a bird and half like a alligator. Seeing these fossilized animals show that over
time they have evolved from one type of creature into many therefor proving that
common descent is true. Although fossils are a great way to prove common descent
has occurred there are also many other ways.
Biochemistry is another way to prove common descent. Biochemistry is
details from many organisms that trace back to a single group of organisms.
Scientists use many different chemical tests to show that all organisms have similar
DNA. They also find that all organisms have similar proteins. By finding that they
have DNA that is similar you can then conclude that these animals have a common
ancestor.
Biogeography is a way of looking at the way plants and animals have evolved
from their geographical distribution. In 1876 a man by the name of Alfred Wallace
wrote a book about Biogeography. This book states that there are 6 different regions
of the earth. Each Biogeographical region has its own specific organisms that are
unique to that region. A major factor that affects where these regions are is the...