Which blood type could be given as a transfusion for patient with ab blood when the rh factor is unknown? a. o+ b. a+ c. ab+ d. ab–

Which plains area lies in both the united states and canada? altiplano central canadian shield coastal plains great plains

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.