Stem cells can form many kinds of cells. In contrast, most body cells cannot form different types of cells. For example, skin ce
lls can only make skin cells and nerve cells can only make nerve cells. Which statement best explains why skin cells will never become nerve cells? A.) Each type of cell receives a different message from the central DNA, which is stored in DNA cells.
B.) Each type of cell has only the part of the DNA necessary for making that type of cell.
C.) Each cell type is determined by messages sent from the brain, which directs development.
D.) Both types of cells have the same DNA, bt the cells have different genes turned on resulting in a different type of cell.
Soils rich in humus improve plant growth. Earthworms breakdown organic matter to form humus. From the data, it can be seen that plant growth is high in soil that has humus.
