Decreases? I think.........
It should be where the rivers separate through Nigeria
One simple and easy way that scientists can accurately date fossils found is through the ground levels. When you take a big chunk out of the earth, you can see the changes in the texture in the "ground" Each "layer" represents a set of years. And as you get further and further into the ground, fossils become older and older.
<span>The study of how traits are inherited though the interaction of alleles is defined as genetics and it began in the 1850's. Gregor Mendel was the first scientist to study genetics. </span>
