If the ease of oxygen pickup depends on oxygen concentration, would respiration be easier in air or in water?

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

Plants that have reproductive structures called cones are?

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half