5. a statement about what the results of a scientific study will be is called
a an experiment
b a hypothesis
c a prediction
dan observation

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.

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

What kind of crystalline solid is graphite? o a. molecular solid b. metallic solid o c. network solid d. ionic solid