Multiple soil horizons make up a soil profile. Soil horizons are distinguishable regions of soil. They run parallel to the surface and have different characteristics. The soil horizons include the A horizon, E horizon, B horizon and C horizons.
The soil profile is a vertical cross section showing these horizons.
I think the crust is formed by volcanic activity
The answer would be: <span>secondary aging.</span>
There is two type of aging, primary and secondary aging. Primary aging is the one that happens because of the age so it can't be prevented. Secondary aging happens because of bad diet and disease, so it can be prevented by doing healthy lifestyle or medicine.
Sister chromatids separate from each other and migrate to opposite ends of the cell.
