1.Ecology: study of relationship ofliving beings (plants and animals) with environment. Also called Environmental biology.
2.Palynology: study of microspores or pollen grains.
3.Palaeontology: study of fossils.
4.Molecular Biology: Study of nature of biomolecules and their interactions in an organism
5.Astrobiology:study of extra-terrestrial life.
6.Biochemistry:study of bio-chemical process (e.g. diffusion, osmosis etc.)
7.Biophysics: study of application of physics principles in life processes.
8.Taxonomy: study of identification,nomenclature and classification of animals and plants.
9.Genetics: study of genes and inheritance
10.Bacteriology: study about bacteria.
11.Virology: study about viruses.
12.Eugenics: study of application of knowledge of genetics to the human welfare.
13.Bioinformatics: information processing of data in molecular biology by using computers.
14.Phytogeography: study about distribution of plants in different parts of the globe.
15.Mycology: study about fungi.
16.Phycology: study about algae.
17:Neuroradiology: Branch of radiology focuses on the diagnosisand abnormalities of nervous system.
18.Biotechnology: use of organisms or their parts to produce useful products like medicines.
19.Ethology: study of how animalsbehave, particularly in their natural environments.
20.Paleoanthropology:study of human origins and evolution.
21.Sociobiology: study of social behavior based on evolutionary theory.
22.Osteology: study of bones.
23.Physiology: study of various body functions and processes (E.G. respiration, photosynthesis,growth etc.)