If a heterozygous type A (ABO blood type) male crossed with a type O female, what would be the phenotypic ratio of type A: type B: type AB: and type O in the offspring?

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

Which beat describes the brain stem

How do living things obtain phosphorus