Answer:
Surface Horizon (A)
Nutrient depletion of soils is a widespread soil degradation phenomenon that occurs as a consequence of soil erosion<u> (it is the topsoil in which generally most soil nutrients are present that erodes fastest) </u>but also because of poor management practices, such as slash and burn and other subsistence agricultural.
Indirectly to the fact that it does not need energy to transport water from a concentration gradient.
Nerves cells, or an Oocyte (egg cell) the largest cell and can be seen by the eye.
True rainforests cover less than 2 percent of the earths total surface
