Which description best explains the role of dna in the differentiation of the cells within an organism? a) each cell has a different set of dna that determines the traits of the cell and causes differentiation. b) each cell has the same dna, so dna does not play a role in differentiation. c) cells do not use the same sections of dna in the same proportions, at the same time in development, which leads to differentiation. d) dna mutates differently in each cell depending on the environment causing each cell to differentiate over time.

 B) Each cell has the same DNA, so DNA does not play a role in differentiation.

Although the cells within an organism contain the same DNA, cellular RNA has a more important role than DNA in cell differentiation.

Explanation:

DNA stores hereditary information for a very long period and provides the blueprint for making a specialized cell. Whereas the RNA uses that information given by the DNA and involves itself in production of that specialized type of cell in the process of cell differentiation.

The process of gene expression is vital process where the information to make a special type of cell is used to produce the cell. There is influence of environmental factors also, but it is not the primary cause of cell differentiation.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

the supermassive black hole is in the middle of the galaxy.