www.biologyonline.com Open in urlscan Pro
167.172.62.107  Public Scan

Form analysis
2 forms found in the DOM

GET https://www.biologyonline.com/

<form method="get" id="searchform" action="https://www.biologyonline.com/" role="search">
  <label class="sr-only" for="s">Search</label>
  <div class="input-group">
    <input class="field form-control" id="s" name="s" type="text" placeholder="Search Biology Terms &amp; Topics" value="" required="">
    <span class="input-group-append">
      <input class="submit btn btn-primary" id="searchsubmit" name="submit" type="submit" value="Search">
    </span>
  </div>
</form>

GET https://www.biologyonline.com/

<form method="get" id="searchform" action="https://www.biologyonline.com/" role="search">
  <label class="sr-only" for="s">Search</label>
  <div class="input-group">
    <input class="field form-control" id="s" name="s" type="text" placeholder="Search Terms &amp; Topics" value="" required="">
    <span class="input-group-append">
      <input class="submit btn btn-primary" id="searchsubmit" name="submit" type="submit" value="Search">
    </span>
  </div>
</form>

Text Content

Skip to content


MAIN NAVIGATION

Search

 * Dictionary
 * Articles
 * Tutorials
 * Biology Forum





LEARN BIOLOGY ONLINE

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:


 * Featured Terms
 * All Terms

Search

ABCDEFGHIJKLMNOPQRSTUVWXYZ


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

 * Bacteria
 * Balanced diet
 * Base-pairing rule
 * Benign
 * Biennial
 * Binary fission
 * Binomial nomenclature
 * Biodiversity
 * Biological system
 * Biology
 * Biome
 * Biosphere
 * Biotic
 * Biotic factor
 * Biotic potential
 * Biuret test
 * Bivalent
 * Body fluid
 * Bolus injection
 * Bone matrix
 * Book lungs
 * Botany
 * Buck’s traction
 * Budding


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

 * Ecological niche
 * Ecosystem
 * Ecosystem diversity
 * Element
 * Endemic
 * Endocytosis
 * Endomembrane system
 * Endosymbiosis
 * Endosymbiotic theory
 * Energy coupling
 * Environment
 * Environmental resistance
 * Epidermis
 * Epistasis
 * Equilibrium
 * Eukaryote
 * Eukaryotic cells
 * Evolution
 * Exon
 * Exotic species
 * Exudate


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

 * Gamete
 * Ganglia
 * Gene
 * Genetic diversity
 * Genetic drift
 * Genetic material
 * Genetics
 * Genome
 * Genotype
 * Genotypic ratio
 * Genus
 * Glucose
 * Glycerol
 * Glycogenolysis
 * Glycolipid
 * Glycolysis
 * Golgi apparatus
 * Graded potential
 * Gram-positive bacilli
 * Gram-positive cocci
 * Group translocation
 * Growth
 * Guanine


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

 * Jaundice
 * Jaw
 * Jaw jerk reflex
 * Jellyfish
 * Joint
 * Joint capsule
 * Joints of pelvic girdle
 * Jugulo-omohyoid node
 * Juice
 * Juncturae cinguli membri superioris


K

 * Kcat
 * Kd
 * Kelp
 * Kempner diet
 * Keq
 * Keratin
 * Keratinocyte
 * Kernel
 * Ketose
 * Ki
 * Kidney
 * Kidney calices
 * Kilocalorie
 * Kind
 * Kinesis
 * Kinetochore
 * Kingdom
 * Kingdom Animalia
 * Kleptoparasitism
 * Krebs cycle


L

 * Labia
 * Lacuna
 * Lanugo
 * Law of Dominance
 * Law of Independent Assortment
 * Law of Segregation
 * Lethal mutation
 * Leukocytosis
 * Life
 * Ligase
 * Light energy
 * Limiting factor
 * Lipid
 * Lipolysis
 * Longitudinal section
 * Loose associations
 * Loose connective tissue
 * Lysis
 * Lysosome


M

 * Matrix
 * Median
 * Medium
 * Meiosis
 * Memory cell
 * Metabolism
 * Metamerism
 * Microbe
 * Micromolecule
 * Missense mutation
 * Mitochondrion
 * Mitosis
 * Monosaccharide
 * Morphology
 * Multiple alleles
 * Muscular system
 * Mutagen
 * Mutation
 * Mutualism
 * Mutualistic symbiosis
 * Myocardium


N

 * Naked virus
 * Natural selection
 * Negative feedback
 * Nematocyst
 * Nephron
 * Nerve impulse
 * Net photosynthesis
 * Net primary productivity
 * Neutral mutation
 * Non Random Mating
 * Non-living thing
 * Nondisjunction
 * Nuclear envelope
 * Nucleolus
 * Nucleosome
 * Nucleotide
 * Nucleus
 * Null hypothesis
 * Nulliparity


O

 * Obligate aerobe
 * Obligate anaerobe
 * Obligate parasite
 * Observation
 * Okazaki fragment
 * Oligosaccharide
 * Omnivore
 * Open circulatory system
 * Opportunistic pathogen
 * Opsonization
 * Orbits
 * Order
 * Organelle
 * Organic compound
 * Organic matter
 * Organic molecule
 * Organism
 * Organization
 * Osmosis
 * Osmotic Potential
 * Osseous tissue
 * Oxidation


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

 * Quadrangular cartilage
 * Quadrantanopia
 * Quadrat
 * Quantitative analysis
 * Quantitative trait
 * Quaternary structure
 * Quellung phenomenon
 * Quenching
 * Quill
 * Quinacrine banding
 * Quinone


R

 * Race
 * Radial symmetry
 * Realized niche
 * Recessive
 * Redox reaction
 * Reducing sugar
 * Reduction
 * Regulation
 * Relative fitness
 * Replication
 * Reproduction
 * Reservoir host
 * Residue
 * Respiration rate
 * Resting potential
 * Reticular connective tissue
 * Revolution
 * Rhizome
 * Ribonucleic acid
 * Ribosome


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


T

 * Tap water enema
 * Taxis
 * Taxon
 * Taxonomy
 * Telophase
 * Telophase II
 * Thalassophobia
 * Theory
 * Thermophile
 * Thin filament
 * Thymine
 * Tissue
 * Totipotent
 * Traits
 * Transcription (biology)
 * Translation
 * Tree
 * Triploblastic
 * Trophic level
 * True breeding
 * Turgidity
 * Turgor pressure


U

 * Ultradian rhythm
 * Unconditioned stimulus
 * Undergrowth
 * Undulating membrane
 * Unicellular
 * Uniform
 * Unipennate muscle
 * Uniport
 * Unipotent cell
 * Universal solvent
 * Unmyelinated neuron
 * Unsaturated fatty acid
 * Unsustainability
 * Uracil
 * Urethra
 * Urinary system
 * Urine
 * Uterine cycle
 * Uterine involution


V

 * Vapor
 * Variable
 * Variation
 * Vascular plants
 * Vector
 * Vegetable
 * Vegetative reproduction
 * Ventilation
 * Vertical gene transfer
 * Vesicle
 * Vestibule
 * Vestigial
 * Viability
 * Viable
 * Virulence
 * Viscera
 * Viscous
 * Vmax
 * Voice quality
 * Voluntary muscle


W

 * Wagners syndrome
 * Walnut
 * Waste management
 * Wasted ventilation
 * Water
 * Water mold
 * Water potential
 * Water table
 * Wavelength
 * Waxes
 * Weather
 * Weed
 * White adipose tissue
 * White blood cell
 * White line of toldt
 * Wild type
 * Wood
 * Wood units
 * Wuchereria bancrofti


X

 * X chromosome
 * X linkage
 * X-linked
 * X-linked inheritance
 * X-ray
 * Xanthophyceae
 * Xanthophyll
 * Xanthophyte
 * Xerophile
 * Xerophthalmia
 * Xerophyte
 * Xxy syndrome
 * Xylem
 * Xylem fiber
 * Xylem parenchyma
 * Xylem vessel


Y

 * Y chromatin
 * Y chromosome
 * Y linkage
 * Y-linked gene
 * Y-linked inheritance
 * Yac
 * Yeast
 * Yellow fever virus
 * Yield
 * Ym-shift
 * Young-helmholtz theory of colour vision
 * Youpon


Z

 * Z disc
 * Zebra
 * Zeitgeber
 * Zinc
 * Zonation
 * Zone of inhibition
 * Zooflagellate
 * Zoogeography
 * Zoology
 * Zoomastigophora
 * Zooplankton
 * Zoospermia
 * Zoospore
 * Zwitterion
 * Zygote
 * Zygotene
 * Zymogen
 * Zymogen granules




FEATURED FORUM TOPICS

See all Topics

Explore our Forums and discover the living world. Feel free to post your
thoughts and questions, and get answers from our esteemed online community.

 * Where does protein synthesis take place
 * What is phylum Chordata?
 * What does mRNA do in protein synthesis?
 * Sympatric vs allopatric speciation
 * Asexual and sexual reproduction- differences!
 * Advantages and disadvantages of asexual reproduction
 * Difference between homologous chromosomes and sister chromatids
 * Smooth muscle vs dense regular connective tissue
 * What is the key to the recognition of codominance?
 * Incomplete dominance vs codominance




BIOLOGY ARTICLES

Keep up with the latest trends and new insights in the field of Biology.

See all Articles

BONDOK’S CLASSIFICATION OF THE THALAMIC NUCLEI

Anatomists usually classify the thalamic nuclei according to their relation to
the internal medullary lamina i..

MENDEL’S LAWS: DEFINITIONS

Genetics – a branch of biology that deals with the study of heredity and
variations Variations – d..

GORILLAS IN OUR MIDST – WHAT IT MEANS

Have you tried gorilla on a basketball court perception test? Do you know what
it implicates? Find out in this..

PUBLIC ENGAGEMENT: RISING EXPECTATIONS IN THE DIGITAL AGE

Gone are the simpler days where scientists could isolate and focus solely on
their work, engaging exclusively ..

See all Articles


BIOLOGY TUTORIALS

Working on a research paper, or preparing for an exam. Our Biology Tutorials
will set you up for success.

See all Tutorials

FRESHWATER COMMUNITY ENERGY RELATIONSHIPS – PRODUCERS & CONSUMERS

This tutorial looks at the relationship between organisms. It also explores how
energy is passed on in the food chain an..

THE HUMAN NERVOUS SYSTEM

The nervous system is essentially a biological information highway. This
tutorial gives an overview of the nervous syste..

BIRTH OF A HUMAN BABY

Following nine months inside the mother's womb is the birth of the baby. Know
the different stages of the birthing proce..

NEUROLOGY OF ILLUSIONS

Illusions are the perceptions and sensory data obtained from situations in which
human error prevents us from seeing the..

See all Tutorials

 * Home
 * Dictionary
 * Articles
 * Tutorials
 * Biology Forum
 * About Us
 * Contact Us
 * Editorial Guidelines

The content on this website is for information only. It is not intended to
provide medical, legal, or any other professional advice. Any information here
should not be considered absolutely correct, complete, and up-to-date. Views
expressed here do not necessarily reflect those of Biology Online, its staff, or
its partners. Before using our website, please read our Privacy Policy.

© 2001-2023 BiologyOnline. All Rights Reserved
X