Heart attack is a serious condition where parts of the heart die as a result of a blockage or break within the blood vessels that supply it with blood and oxygen. Explain how a heart attack could affect the overall functioning of the body. Explain your answer and use evidence to support your argument.

What is an animal that lives by preying on other animals

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 of these is most likely to happen if parallax measurements of star distances are taken after a gap of six months? the results would be accurate the results would be inconsistent the results would not be valid the results would not be repeated