Which layer of skin could be thought of as a sturdy raincoat or biohazard suit

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

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

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different