A28 year old female presents with severe chest pain and shortness of breath. she is diagnosed with pulmonary embolism. which is most likely the source of the embolism

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.

Explain the significance of the increased cell specialization of the volvocine line

Whats one way that rocks do not follow the typical rock cycle pathway?