How does failure in the digestive system affect the muscles?

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.

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.