Biology definition: Biology is scientific study of life. The word biology has been derived from two Greek words 'bios' meaning 'life' and 'logos' meaning 'study'. There are three division of biology that we will discuss and many branches .There are many application of biology in medicine for disease treatment, in agriculture, in conservation, in biotechnology and environmental sciences. Some famous biologists are Charles Darwin, Gregor Mendel, Louis Pasteur, James Watson, Francis Crick and Jane Goodall. Divisions : There are three major divisions of biology; zoology, botany and microbiology.
Zoology: It deals with the study of animals and their interaction with environment. It includes animal classification, animal behavior, physiology, evolutionary adaptation, ecosystem, biodiversity, animal development their nutrition, digestion, reproduction and breeding. There are many subfields of zoology that are mammalogy, ornithology, herpetology, ichthyology, entomology, arachnology, ethology, wildlife biology, conservation biology and veterinary medicine. Botany: It deals with the study of plants including their structure, growth, development, reproduction, metabolism, evolution, classification and distribution. Subfields of botany are plant anatomy, plant physiology, plant ecology, plant genetics, plant systematics, ethnobotany, horticulture, plant pathology, plant biochemistry and phytochemistry. Its key concepts are photosynthesis, transpiration, respiration, plant hormones, tropisms, plant defenses and symbiotic relationship. Microbiology: It deals with the study of microorganisms such as bacteria and viruses etc. These tiny life forms have a great impact on our world. Its subfields are bacteriology, virology, mycology, parasitology, immunology, microbial ecology, microbial genetics and microbial physiology. Its key concepts are microbial cell structure and function, metabolism, growth and reproduction, evolution and phylogeny, host-microbe interactions, immune responses and microbial diversity and ecology.
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