2). WHAT TWO THINGS MUST HAPPEN TO PEOPLE IN DEVELOPING COUNTRIES IN ORDER TO BECOME LIKE INDUSTRIALIZED COUNTRIES AND BE ABLE TO REDUCE POPULATION GROWTH?

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.

Which term describes a normal value for something in the body? a. homeostasis b. set point c. feedback loop d. integration center

What was the purpose of mendel's experiments with dihybrid crosses? a. to determine if dna was a transforming factor b. to determine if traits could be recessive c. to determine if traits affected each other d. to determine if traits had more than one allele