The answer to your question is dna replication.
Answer: As each cell differentiates, the <em>DNA </em>changes so that each type of cell has different <em>DNA</em> once it reaches maturity. Mutations in the cells’ nuclei lead to new combinations of <em>DNA</em>, resulting in different shapes and functions in the different types of cells.
Hope this helps!
Answer:
option C is the correct option
Answer:
Positive feedback loops occur most frequently in the human body.
The layers on the top may be younger, while the bottom layers may be much older.
