Humus creates good soil tilth, which is an indirect benefit of microorganism action.
Please select the best answer from the choices provided
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OF

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.

Drag each label to the correct location on the chart. match the function to the type of tissue

Which atmospheric later is where earths northern and southern lights occur