The red blood cells of patients with stickle cell anemia take on a( shape a) oblong b) crescent c) rectangular d) heart

If the singular term ends in -us, the plural is usually formed by changing the ending to

If birth rates fall below the replacement level, then a country is in which stage of demographic transition? a. urbanization/industrialization b. mature industrial c. postindustrial d. pre-modern

True or false mucous membranes destroy pathogens on the outer body surface, at body openings.