Sickle cell anemia is a disorder common in the sub-saharan region of africa. although sickle cell anemia is generally fatal, having one allele for the disorder is also known to make a person resistant to malaria. research shows that in the areas where malaria is most common, the sickle cell trait is seen in more than 40% of the total population.
a bioaccumulation
b geographic isolation
c interbreeding
d natural selection

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. threat method number of species that benefit number of years to see benefit habitat fragmentation reforestation 450 8 introduced prey species biological augmentation 150 2 which statement is an accurate explanation of the information in the table? a. biological augmentation would benefit only a few species because it is typically not very effective. b. biological augmentation would take less time to be effective because it targets the majority of prey species. c. reforestation would take the longest time to be effective because trees take several years to grow. d. reforestation would not benefit many species because most forest species live on the ground.

How many major plates cover the earth

Set comes up with for examples of sound waves ocean wave light wave and hand wave which of tonys examples is not an actual scientific wave