Question Detail Leukemia is a disease of the ? lungsbloodliverbrain Answer: Option B Similar Questions : 1. Study of internal structure of organism is called : AgrostologyAgronomyAnatomyAgrology Answer: Option CExplanation:Agrostology - Study of grass Agronomy - Science of soil management and production of crop. Agrology - Soil science dealing with production of crop. 2. Placenta is the structure formed : by fusion of germ layersby foetus onlyby the union of foetal and uterine tissueby uterine only Answer: Option C 3. Milk is poor source of CalciumIronCopperSodium Answer: Option B 4. Diabetes is caused by lack of ? SugarCalciumVitaminInsulin Answer: Option D 5. Who invented Polio Vaccine ? Harrison and SympsonJohan E. SalkLuvenhauk - LeeuwenhockKarl Landsteiner Answer: Option BExplanation:Harrison and Sympson invented chloroform, Luvenhauk - Leeuwenhock invented Bacteria, Karl Landsteiner invented Blood Transfer. Read more from - Biology Questions Answers