A. science of the various kinds of serum
B. artificial rearing of fish
C. art of silkworm breeding
D. study of various cultures of a community

A. skeletal
B. excretory
C. nervous
D. digestive

A. useful to life
B. harmful to life
C. both useful and harmful to life
D. None of above

A. infectious diseases
B. deficiency diseases
C. water borne diseases
D. diseases of debility

A. the gums
B. the teeth
C. salivary glands
D. lungs

A. left auricle
B. right auricle
C. right ventricle
D. left ventricle

A. taste and smell nerves
B. nasal and mouth cavities
C. taste nerves and the nose
D. smell nerves and the mouth

A. 0.04%
B. 0.004%
C. 0.4%
D. 4.4%

A. epdermis
B. ectoderm
C. dermis
D. endoderm

A. fish and mammals
B. birds and mammals
C. amphibians and birds
D. amphibians and reptiles