If a certain strain of bacteria was called highly virulent what does this mean

What molecule does hemoglobin decay into over time

Which of the following terms describes all of the non-living components of an ecosystem

1. beginning with all chambers of the heart in the "relaxed" phase, describe the cardiac cycle in mammals, with systole and diastole of the atria and ventricles. for each time point in the cycle you select, state the following: • whether the atria and ventricles are contracting or relaxing • whether the av valves and semilunar valves are closed or open • whether the pressure in the atria and ventricles is high or low