Reason - It is where volcanic, tectonic places and rifts occurs which is the crust of the earth. Without the geosphere aka crust we wont be able to have a solid piece of land to stand on.
When a person is exercising the body needs to deliver increased amounts of oxygen to the muscles which component of blood ensures that the muscles will receive it
The chromosomal structure that limits the number of cell divisions of a cell is the the chromosomal structure that limits the number of cell divisions of a cell is the kinetochore telomere histones centromere