Biology
Articles about living organisms, life processes and biological research.
Taste bud
Taxidermy
Taxon
Taxon (taxa): definition, ranks, and role in biological classification
A taxon (plural: taxa) is any named or defined group of organisms used in biological classification. This article explains what taxa are, common ranks, historical development, exam
Taxonomy
Taxonomy: principles and practice of classifying organisms
Telomerase
Telomere
Temporal bone
Tentacle
Tentacle (limblike organ found in animals and plants)
Tephritidae
Tephritidae (tephritid fruit flies)
Terrestrial locomotion
Terrestrial locomotion: forms, evolution, and adaptations
Testicle
Testicle (testis): structure, function, and clinical overview
Tetrapod
Tetrapods — four-limbed vertebrates and their evolutionary significance
Tetrapods are vertebrates descended from four-limbed ancestors. This article explains their defining traits, major groups, fossil origins, evolutionary transitions, and notable ada
Tetrapodomorph
The Genetical Theory of Natural Selection
The Red Queen
The Red Queen (evolutionary hypothesis and its uses)
The Selfish Gene
The Selfish Gene: Richard Dawkins’s gene-centered account of evolution
Theriodont
Thermophile
Thermoregulation
Thiotrichales
Thiotrichales: an order of sulfur‑associated and diverse bacteria
Thorax
Thrips
Thrips (Thysanoptera): tiny fringed-wing insects, pests and pollinators
Thrombolite
Thrombosis
Thrombosis: formation, types, symptoms, diagnosis and treatment
Thymus
Thymus — primary lymphoid organ for T cell development
Tibia
Tissue
Tissue (biology): structure, types, functions and study
Tissue culture
Tobacco mosaic virus
Tobacco mosaic virus (TMV)
Toe
Toe: anatomy, function, variation and clinical notes
Toll-like receptor
Toll-like receptor (TLR)
Tongue
Tongue: anatomy, functions, sensation and clinical overview
Concise encyclopedia entry on the human tongue: structure, surface features, taste, roles in eating and speech, innervation, blood supply, common conditions and basic clinical and
Tooth
Tooth: structure, function, development and evolution
Torpor
Torpor: energy-saving physiological state in birds and mammals
Touch
Touch: the somatic sense of contact, temperature and pain
Toxicofera
Toxoplasma
Toxoplasma gondii: biology, transmission, and clinical significance
Trace fossil
Trace fossil (ichnofossil)
Trachea
Trachea (windpipe): structure, function and clinical significance
Trait
Trait (biology): definition, types, inheritance and significance
Transcript
Transcript (record, academic record, and genetic transcription)
Transcription (genetics)
Transcription (genetics): how cells copy DNA into RNA
Transcription factor
Transcription factor — proteins that control gene expression
Transcriptome
Transcriptome: the complete set of RNA molecules expressed by cells
Transduction (genetics)
Transduction (physiology)
Transfection
Transfection: introduction of nucleic acids into cells