Biology

Escape reflex

Escape reflexes: rapid neural circuits for fleeing danger

Escherichia

Escherichia coli

Escherichia coli (E. coli): biology, roles, and public health

Overview of Escherichia coli: its biology, role in the gut and environment, historical discovery, use in research, diversity of strains, and relevance to food safety and antibiotic

Essential fatty acid

Ethmoid bone

Ethmoid bone: structure, function, and clinical significance

Ethology

Ethology: the scientific study of animal behaviour

Euarchontoglires

Euarchontoglires: the placental mammal clade uniting primates, rodents, and relatives

Euglena

Euglenozoa

Eukaryote

Eulipotyphla

Eumuroida

Eunice aphroditois

Eusociality

Eusociality: the highest level of animal social organization

Eutely

Eutely: the biological phenomenon of a fixed somatic cell number

Eutheria

Evolution

Evolution (biological process)

Evolution of cetaceans

Evolution of cetaceans: from terrestrial mammals to ocean specialists

Evolution of colour vision

Evolution of the eye

Evolution of the Eye: Origins, Diversity, and Function

Evolutionary arms race

Evolutionary biology

Evolutionary biology: processes of species change, history, and applications

Evolutionary developmental biology

Evolutionary developmental biology (evo‑devo)

Evolutionary grade

Ewing's sarcoma

Excretion

Exercise physiology

Exocrine gland

Exocrine gland: definition, structure, function and clinical significance

Exome

Exopterygota

Exopterygota: insects with externally developing wings

Exoskeleton

Exotoxin

Exsanguination

Exsanguination: severe blood loss — causes, care, and forensic aspects

Extant

Extant (biology): living species and taxonomic groups

Extinction

Extinction (biology): causes, patterns, and conservation

Extraterrestrial life

Extremophile

Extremophile: organisms adapted to thrive in extreme environments

Eye

Eye (organ of vision)

The eye is the light-sensing organ that enables vision. This article outlines its structure, how it forms images, variations across animals, human vision issues, and notable adapta

Eyelash

Eyelash: structure, function, growth and care

Eyelid

Eyespot

Fallopian tube

Family (biology)

Family (biology): taxonomic rank and role in classification

Fanconi anemia

Fasciola hepatica

Fasciola hepatica: the common liver fluke

Fauna

Fauna — the animal life of regions, habitats and geological eras

Feather

Fecundity