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.
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Fertilisation maybe...........
Answer:
Ceiling
Explanation:
A situation in which the price charged for some marketed objects becomes more or less than the equilibrium price that is determined by market forces of demand and supply, is called Price Ceiling. Government often uses price ceiling to control the maximum selling price of commodities. By doing this, the commodities are made affordable for the public in country. In house rent market, price ceiling is of great importance.