A mother has blood type A and her son has blood type O. Which blood types are possible for the father?

Individuals do not compete directly for resources, but are prey for the same predator

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.

This rapid change in species that rarely leaves behind fossil evidence is referred to as