See List of biology topics for the complete alphabetical list of Wikipedia articles addressing topics in biology. Below is a structured list of only the basic topics. Please see the most basic encyclopedia article topics for general instructions on constructing this list, and consult complete list of encyclopedia topics.

Structured list :

• Life: origin of life
• Ecology: Biodiversity __ habitat -- population
• Evolutionary biology: evolution -- species -- adaptive radiation -- speciation -- natural selection -- genetic drift __extinction -- fossil __sexual reproduction -- asexual reproduction -- colony __ growth curve -- phylogeny __ evolutionary tree -- selection -- allele frequency -- neutral theory of molecular evolution -- population genetics
  • Techniques: molecular clock
• Life forms
  • viruses : DNA viruses __ RNA viruses -- retroviruses
  • Single_cell organisms:
    • prokaryotes : microbe -- bacteria -- archaebacteria __ eubacteria
    • eukaryotes: fungi -- algae -- protozoa -- protista
  • Multicellular organisms:
    • plantae -- plants
    • animalia -- animals --metazoa
    • fungi
• Physiology:
  • metabolism -- nutrition -- primary nutritional groups -- respiration -- senescence
  • organ and systems: skeleton __ eye -- muscle -- joint -- brain -- liver __ kidney -- heart -- lung
    • nervous system: limbic system __ vestibular system -- vision -- audition -- proprioception -- olfaction -- memory
    • immune system: antibody -- host -- vaccine
  • tissues: blood -- Bone -- cartilage
  • Cells: neuron -- stem cell -- blood cell -- immune cell -- skin cell
  • Techniques: electrophysiology
• Medicine:
  • Diseases: cancer -- diabetes -- obesity
  • Drugs: antibiotic -- barbiturate -- SSRI
  • Techniques: MRI -- Computed axial tomography __ blood count
• Genetics (classical genetics) : genotype -- phenotype -- Mendelian inheritance __ gene -- allele __ chromosome -- haploid __ diploid -- homozygote __ heterozygote -- locus __ trait -- complementation __ suppression __ epistasis -- mutation __ recombination -- genetic linkage -- genetic interactions __ segregation -- genetic mosaic -- maternal effect __ dominant gene -- recessive gene -- penetrance -- genotype-phenotype distinction -- crossover -- polymorphism
  • Model organisms: Drosophila __ Arabidopsis -- Caenorhabitis elegans -- mouse __ Saccharomyces cerevisiae -- Escherichia coli -- Lambda phage __ Xenopus
  • Techniques: genetic screen -- paternity test __ linkage map __ genetic map
• Developmental biology : embryo -- gamete -- morphogenesis
• Cell biology:
  • the cell
  • cell components:
    • organelles: endoplasmic reticulum __ Golgi apparatus -- nucleus -- cytoplasm -- vacuole -- vesicle -- mitochondrion -- lysosome -- peroxisome -- chloroplast
    • membranes: plasma membrane __ mitochondrial membrane -- endomembrane system -- chloroplast membrane
    • ribosomes
    • Other subcellular features: synapse -- axon -- dendrite -- pseudopod -- cytoskeleton -- mitotic spindle
  • cell processes: protein biosynthesis -- cellular respiration -- programmed cell death -- apoptosis -- citric acid cycle -- photosynthesis __ cell senescence
    • cell signaling: hormone -- action potential __ synapse
    • signal transduction: second messenger -- receptor
    • cellular reproduction: mitosis -- meiosis __ centromere
  • Techniques: microscope -- culture

• Biochemistry :
  • Biomolecules:
    • Small: amino acids -- lipids -- phospholipid -- prion -- vitamins -- neurotransmitter
    • Biopolymers/macromolecules
      • proteins: primary structure -- secondary structure -- tertiary structure -- conformation __ native state -- protein folding -- enzyme -- receptor --transmembrane receptor__ ion channel -- membrane transporter-- collagen -- silk
      • DNA -- RNA
      • polysaccharide: cellulose __ carbohydrate
  • Biochemical mechanisms: proteolysis -- cooperativity
  • Techniques: electrophoresis -- His tag --affinity chromatography -- x-ray diffraction -- Proteomics -- mass spectrometry
• Molecular biology: DNA __ RNA -- plasmid -- virus -- replication -- genetic code -- translation -- transcription --DNA replication__ gene expression--transcription factor -- recombination __ hybridization --nucleosome -- histone -- promoter -- enhancer -- mutation
  • molecular genetics: DNA fingerprinting -- genetic fingerprint -- microsatellite -- gene knockout-- imprinting -- RNA interference
  • Genomics: computational biology __ bioinformatics
  • Molecular Techniques: gel electrophoresis -- transformation -- PCR -- PCR mutagenesis -- primer -- chromosome walking -- RFLP -- restriction enzyme -- sequencing -- shotgun sequencing __ cloning -- culture --DNA microarray

• Biology divisions : Acarology -- Anatomy __ Arachnology -- Biochemistry __ Bioinformatics -- Biomechanics -- Bionomics -- Biophysics -- Biotechnology __ Botany -- Cell biology __ Ecology -- Entomology __ Evolution -- Genetics __ Gerontology -- Herpetology __ Histology -- Ichnology __ Ichthyology -- Immunology __ Limnology -- Marine biology __ Microbiology -- Molecular biology -- Mycology __ Myrmecology -- Neurobiology __ Ornithology -- Paleontology -- Palynology -- Parasitology -- Photobiology __ Phycology -- Physiology __ Plant physiology -- Biological psychology-- Radiobiology -- Sociobiology -- Structural biology __ Taxonomy -- Virology -- Zoology

• Biologists: Charles Robert Darwin __ Alfred Russel Wallace -- Jean-Baptiste Lamarck -- Sir Charles Lyell -- Alexander Fleming __ Andrew Huxley -- Robert Koch -- Konrad Lorenz -- Ernst Haeckel -- Theodor Bilharz -- Marcello Malpighi -- Antoni van Leeuwenhoek __ Konrad Lorenz -- Thomas Malthus -- Edward Jenner __ Carolus Linnaeus -- Sewall Wright -- Louis Pasteur -- Gregor Mendel -- James D. Watson __ Francis Crick -- Kary Mullis -- Craig Venter -- Lynn Margulis