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Biology Online is the world’s most comprehensive database of Biology terms and topics. Since 2001 it has been the resource of choice for professors, students, and professionals needing answers to Biology questions. Search over 75,000+ terms, news, insights, discoveries, and trends in Biology below:
A
- Abiotic
- Active transport
- Adaptation
- Aerobic bacteria
- Alimentary canal
- Allele
- Allopatric speciation
- Amphipathic
- Anabolism
- Anaerobic
- Anaerobic respiration
- Analogous
- Analogous structures
- Anatomy
- Angiosperm
- Animal
- Animal cell
- Antagonistic Muscle
- Antigen
- Apoenzyme
- Asexual reproduction
- Assimilation
- Autocrine signaling
- Autotroph
- Axon hillock
- Axon terminal
B
C
- Carbon fixation
- Carrier protein
- Carrying capacity
- Cell
- Cell morphology
- Cell wall
- Cellular respiration
- Chemiosmosis
- Chloroplast
- Chordata
- Chromatin
- Chromosomal mutation
- Chromosome
- Class
- Codominance
- Codon
- Coenzyme
- Cohesion
- Commensalism
- Complete dominance
- Concentration gradient
- Condyloid joint
- Convergent evolution
- Convoluted
- coronavirus COVID-19
- Cross-linking
- Cytokinesis
- Cytoplasm
D
- Darwinian fitness
- Deciduous forest
- Decomposer
- Definitive host
- Dehydration reaction
- Demographic transition
- Dense irregular connective tissue
- Dense regular connective tissue
- Density dependent factor
- Density dependent limiting factor
- Deoxyribonucleic acid
- Desiccation
- Diaphoresis
- Diarthrodial joint
- Dichotomous
- Differentiation
- Diffusion
- Diploid
- Disruptive Selection
- Divergent evolution
- Dominant
- Dominant species
E
F
- Facilitated diffusion
- Facultative anaerobe
- Family
- Family traits
- Fastidious
- Fecundity
- Feedback mechanism
- Female
- Fermentation
- Fibrinous exudate
- Fibrocartilage
- Filtration
- First-order kinetics
- Fitness
- Flaccid
- Flora
- Fluid mosaic model
- Focus
- Follicle-stimulating hormone
- Fragmentation
- Frameshift mutation
- Fundamental niche
- Fungi
G
H
- Haploid
- Heredity
- Hermaphrodite
- Heterotroph
- Heterozygous
- Homeostasis
- Homo sapiens sapiens
- Homogenous
- Homologous
- Homologous chromosome
- Homologous structures
- Homozygous
- Host cell
- Hyaline cartilage
- Hydrophilic
- Hydrophobic
- Hyperosmotic
- Hypersensitivity
- Hypertonic
- Hypomelanism
- Hypothesis
- Hypotonic
- Hypotonic solution
- Hypotonicity
I
- Immunoglobulin
- Imprinting
- In situ
- Incomplete dominance
- Incubation period
- Independent variable
- Individual
- Induced fit model
- Inoculation
- Inoculum
- Inorganic compound
- Intercalary meristem
- Intermediate host
- Interphase
- Interspecific competition
- Interstitial fluid
- Intracellular digestion
- Involuntary muscle
- Iodine test
- Ionic bond
- Isotonic
J
K
L
M
N
O
P
- Parenchyma
- Parthenogenesis
- Passive transport
- Peritoneum
- Phagocytosis
- Phenotype
- Phenotypic ratio
- Phosphodiester bond
- Phylum
- Physiological adaptation
- Pinocytosis
- Pioneer species
- Pleiotropy
- Polygenic inheritance
- Polypeptide
- Population
- Positive feedback
- Postulate
- Primary succession
- Process
- Progeny
- Prokaryote
- Protein synthesis
- Protist
- Punnett Square
- Pyruvate
Q
R
S
- Saccharide
- Sarcolemma
- Secondary consumer
- Selectively-permeable membrane
- Semilunar valve
- Sex-linked trait
- Sexual reproduction
- Simple diffusion
- Simple squamous epithelium
- Single stranded DNA virus
- Skeletal system
- Smooth endoplasmic reticulum
- Smooth muscle
- Solute
- Solvent
- Species
- Starch
- Stimulus
- Structure
- Substrate
- Symbiosis
- Sympatric speciation
- Synergistic effect
- System
