Biology
Articles about living organisms, life processes and biological research.
Krebs cycle
Krebs cycle (citric acid cycle) — central metabolic pathway
L-DOPA
L‑DOPA (levodopa): biological role, medical use, and properties
Labia minora
Labium
Labium: lip-like structures in anatomy, botany, and entomology
Laboratory of Molecular Biology
Labyrinthodont
Labyrinthodonts (Labyrinthodontia): an informal grade of early tetrapods
Lachesis (genus)
Lachesis (genus) — bushmasters, venomous pit vipers of Central and South America
Lacrimal bone
Lactase
Lactase: the enzyme that breaks down lactose in milk
Lactation
Lactation: biology, composition, evolution and role in mammals
Lactobacillus
Lactose intolerance
Lamarckism
Lamarckism: the theory of inherited acquired characteristics and its legacy
Lamellibrachia
Lamellibrachia: cold‑seep tube worms and their chemosynthetic ecosystems
Lancelet
Lancelet (Cephalochordata): anatomy, evolution, and biological importance
Large intestine
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Larva
Larva: Immature life stage of animals that undergo metamorphosis
Overview of larva, the immature life stage in animals undergoing metamorphosis; covers larval forms, feeding and growth, successive instars, examples (tadpoles, caterpillars, maggo
Larynx
Larynx (voice box): anatomy, function, and clinical importance
Lateral line
Lateral line: the sensory system that lets fish feel water movement
Law of the Minimum
Law of the Minimum (Liebig's law)
Lazarus taxon
Leaf miner
Leech
Leech (Hirudinea): biology, behavior and medical applications
Leg
Legionella
Legionella: overview, ecology, disease, detection and control
Leishmania
Lens (anatomy)
Crystalline lens (eye) — structure, function, development and clinical significance
Leptin
Leptin: the adipose-derived hormone that regulates appetite and energy balance
Leptospira
Leptospira — spirochete bacteria that cause leptospirosis
Leuconostoc
Lichen
Lichen: symbiotic organisms of fungi and photosynthetic partners
Life
Life (biology): definition, characteristics, origin and significance
Life (British TV series)
Life (2009 British TV series)
Life cycle
Life cycle — biological stages of development
Life expectancy
Life expectancy: definition, causes, trends and global differences
Ligament
Ligament: structure, function, types, injuries and clinical significance
Ligand
Ligand (biochemistry): definition, binding, types and biological roles
A ligand is a molecule that binds to a target (often a protein) to alter its activity. This article explains binding mechanisms, types of ligands, models, measurements and biologic
Light-dependent reaction
Light-Dependent Reactions of Photosynthesis: Photophosphorylation and Electron Transport
Light-independent reaction
Light-independent reaction (Calvin cycle)
Limb
Limb: biological appendage in animals and plants
Limbic system
Limpet
Limpet (true limpets and similar shelled gastropods)
Lineage (evolution)
Linen
Link reaction
Lip
Lips
Lipase
Lipase: enzymes that break down and remodel fats
Lipid
Lipid: structure, types, and biological roles