What determines how a mineral cleaves? O A. The color of the mineral O B. The size of the mineral O c. The presence of silicates O D. The strengths of the bonds between atoms

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.

Types of scientific inquiry that biologist engage in that cannot be completely controlled

How is the carbon cycle related to global warming ?