Which principle states: "geological processes taking place on earth today operated similarly in the past and can be used to explain past geological events"?
faunal succession
lateral continuity
uniformitarianism
steno's principles

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.

Eutrophication caused by human nutrient pollution.

_is a product of the first stage of photosynthesis. atpglucosecarbon dioxidewater