A. a disease of the nervous system
B. a disease of the digestive system.
C. study of apes
D. disease of the circulatory system

A. the essential fluid portion of blood
B. the sure remedy for colds
C. the third rib of the right side
D. the secretions of endocrine glands

A. Green yellow
B. Blue
C. Red
D. Invisible

A. Gerontology
B. Geology
C. Exbiology
D. None above

A. cod-liver oil
B. properly varied diet
C. vitamin injections
D. vitamin pills

A. aorta
B. pulmonary artery
C. hepatic artery
D. pulmonary vein

A. an elementary unit of heredity
B. a medicine to overcome old age
C. the smallest living organism
D. None of above

A. proteins
B. starch
C. fats
D. None above

A. same as that of sound
B. same as that of elastic waves
C. same as that of light 
D. more than light

A. the happy looking and living among the
men
B. secretions of liver
C. secretions of ductless glands
D. the bone marrow