What are the two upper chambers of the heart called? ( multiple choice) left atrium right ventricle right atrium left aorta left ventricle right aorta

Which stage of stress includes the fight or flight response?

Taking a foil acid supplement during childhood can prevent illness

Which action occurs in the third stage of cell division a. the nuclear material of a cell is copied exactly b. the nuclear membrane disappears c. the cell forms two nuclei or d. the nuclear material separates, with half moving to wither side of the cell