1.4.4 on Life orientation. After reading case study 1 and case study 2 summarize your findings on the impact of risky teenage behaviour on one's well being by referring to the spheres of well being: social, emotional, physical, spiritual ​

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.

What is the term for a water wave that is created by an underwater earthquake?

Which statement describes how favorable traits in a population relate to natural selection? they are the only traits that ever exist in the population. they build in the population over time. they are rarely passed on to offspring. they are found only in a few individuals within the population.