| Ecology | Study of inter-relationship between living and their environment |
| Evolution | Study of origin of life, variation and formation of new species |
| Embryology | Study of factors fertilization of egg, formation of zygote and development of embryo |
| Eugenics | Study of factors connected with the improvement of human race |
| Euthenics | Study of environmental condition that contributed to the improvement of human beings |
| Euphenics | Treatment of defective in heredity through genetics engineering |
| Ethnology | Study of science dealing with different races of human |
| Etiology | Study of causative agents of disease |
| Entomology | Study of possibility of flower |
| Food technology | Scientific processing, preservation, storage and transportation of food |
| Forensic Science | Application of science for analysis of various facts and evidence to identify the cause or the person involve in crime act |
| Fishery | Catching, breeding, rearing and marketing of fishes |
| Forestry | Development and management of forest |
| Fermentation | Process of incomplete oxidation that occur in microbes and other cells in absence of oxygen, leading to the formation of ethyl alcohol |
| Genetics | Study of variation and transmission of heredity character from parents to their young ones |
| Growth | Permanent increase in weight, volume and size of an organism |
| Genetic Engineering | Manipulation of gene in order to improve the organism |
| Gynecology | Study of female reproductive organ |
| Gerontology | Study of ageing |
| Gastroenterology | Study of alimentary canal or stomach and intestine related disorders |
| Hypertonic | When two solution have different solute concentration. The solution which have higher concentration is called hypertonic |
| Hypotonic | In two solutions which have lower solute concentration is called hypotonic |
| Homeothermic | Animals who have constant body temperature are called homoeothermic or warm blooded animal |
| Histology | Study of tissue organisation and their internal structure with the help of microscope |
| Hygiene | Science taking care of health |
| Hydroponics | Study of growing plant without soil in water which contain nutrient |
| Haematology | Study of blood |
| Hepatology | Study of liver |
| Ichthyology | Study of fishes |
| Immunology | Study of immune system or resistance of body to disease |
| Kalology | Study of human beauty |
| Metazoans | All multicellular animals are called metazoans |
| Monoecious | Plants which have both male and female flower |
| Morphology | Study of external structure |
| Microbiology | Study of micro-organism like virus, bacteria, algae, fungi and protozoa |
| Molecular biology | Study of molecule found in the body of living organism |
| Medicine | Study of treating disease by drug |
| Mammography | Branch of science which deal test for breast cancer |
| Mycology | Study of fungi |
| Myrmecology | Study of ant is called myrmecology |
| Mixed farming | Farming along with animal husbandry |