While on the galápagos islands darwin noticed that three were a number of species of finches that he theorized defended from a common ancestor he hypothesized that these finches became isolated on an island and adapted to fit an ecological role on that island what about the finches led darwin to. this belief ?

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated