Which of these is an environmental effect of deforestation? a. temperature decrease b. poisoning wildlife c. soil erosion d. water temperature increase

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.

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

Where can a dna be found in a prokaryotic cell