-because distinct populations of living things exist due to barriers to reproductive change.
-because fossils may be classified into distinct taxa due to the persistence of gaps.
The two reasons why the gaps among existing organisms, as well as the fossil records have remained after hundreds of years of research are because of distinct populations of living things exist due to barriers to reproductive change and because fossils may be classified into distinct taxa due to the persistence of gaps.
The two jobs for the cell is to make energy and make more cells. They make energy by consuming nutrients needed for more energy. To make more cells they reproduce a lot.
The nucleus which contains all of the cell's information does.
Russia's population density is 8.4 people per square kilometre (22 per square mile), making it one of the most sparsely populated countries in the world.
This is more of a personal question about how well you know yourself, no one can answer this for you.
