12) Which of the following activities represents physiological studies? A. making a section through the heart to observe its interior
B. examining the surface of a bone
C. viewing muscle tissue through a microscope
D. drawing blood from laboratory animals to determine their blood sugar levels

Which of the following supports the argument that viruses are nonliving? a) they are not cellular.b) their dna does not encode proteins.c) they have rna rather than dna.d) they do not evolve.

Epidemiology and health expenditure

What are the symptoms of trichomoniasis in males? a. painful urination, a dark discharge from thepenis, with no itchingb. painful urination, a dark discharge from thevagina, with no itchingc. painful urination, a clear discharge from the vagina, and some itchingd. painful urination, a clear discharge from thepenis, and some itching