Although all of the cells in your body contain a complete set of dna, different types of cells arise

Explanation:

Eventhough all stomatic cells have the smae DNA, as they develop, particular cells develop differently and the is known as differentiation and specialization. These changes occur so that an organism has all the cells it needs and is a result of modifications of gene expressions.

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.