Agriculture – study of producing crops from the land, with an emphasis on practical applications
Anatomy – the study of form and function, in plants, animals, and other organisms, or specifically in humans
Astrobiology- the study of evolution, distribution, and future of life in the universe. Also known as exobiology, exopaleontology, and bioastronomy.
Biochemistry – the study of the chemical reactions required for life to exist and function, usually a focus on the cellular level
Bioengineering – the study of biology through the means of engineering with an emphasis on applied knowledge and especially related to biotechnology.
Bioinformatics – also classified as a branch of information technology (IT) it is the study, collection, and storage of genomic and other biological data
Biomathematics or Mathematical Biology – the study of biological processes through mathematics, with an emphasis on modeling.
Biomechanics – often considered a branch of medicine, the study of the mechanics of living beings, with an emphasis on applied use through artificial limbs, etc.
Biomedical research – the study of the human body in health and disease
Biomimetics – science of adapting designs from nature to solve modern problems.
Biophysics - the study of biological processes through physics, by applying the theories and methods traditionally used in the physical sciences
Biotechnology – a new and sometimes controversial branch of biology that studies the manipulation of living matter, including genetic modification
Botany – the study of plants
Cell biology - the study of the cell as a complete unit, and the molecular and chemical interactions that occur within a living cell.
Conservation Biology – the study of the preservation, protection, or restoration of the natural environment, natural ecosystems, vegetation, and wildlife
Cryobiology - the study of the effects of lower than normally preferred temperatures on living beings.
Developmental biology – (Embryology) the study of the processes through which an organism develops, from zygote to full structure.
Ecology - the study of the interactions of living organisms with one another and with the non-living elements of their environment.
Entomology – the study of insects
Environmental Biology – the study of the natural world, as a whole or in a particular area, especially as affected by human activity
Epidemiology - a major component of public health research, it is the study of factors affecting the health and illness of populations
Ethology - the study of animal behavior.
Evolution or Evolutionary Biology – the study of the origin and descent of species over time
Genetics - the study of genes and heredity.
Herpetology – the study of reptiles and amphibians
Histology – the study of cells and tissues, a microscopic branch of anatomy.
Ichthyology - the study of fish
Integrative biology – the study of whole organisms
Mammalogy - the study of mammals
Marine Biology - the study of ocean ecosystems, plants, animals, and other living beings.
Microbiology – the study of microscopic organisms (microorganisms) and their interactions with other living things
Molecular Biology – the study of biology and biological functions at the molecular level, some cross over with biochemistry
Mycology - the study of fungi
Neurobiology – the study of the nervous system, including anatomy, physiology, even pathology
Oceanography – the study of the ocean, including ocean life, environment, geography, weather, and other aspects influencing the ocean.
Ornithology – the study of birds
Population ecology – the study of populations of organisms, including how they increase and go extinct
Population genetics - the study of changes in gene frequencies in populations of organisms
Paleontology - the study of fossils and sometimes geographic evidence of prehistoric life
Pathobiology or pathology - the study of diseases, and the causes, processes, nature, and development of disease
Parasitology – the study of parasites and parasitism
Pharmacology - the study and practical application of preparation, use, and effects of drugs and synthetic medicines.
Physiology – the study of the functioning of living organisms and the organs and parts of living organisms
Phytopathology – the study of plant diseases (also called Plant Pathology)
Virology – the study of viruses and some other virus-like agents
Zoology – the study of animals, including classification, physiology, development, and behavior (See also Entomology, Ethology, Herpetology, Ichthyology, Mammology, and Ornithology)