Biology: Trending topics

  
  
  
  
  

The following are the current most viewed articles on Wikipedia within Wikipedia's Biology category. Think of it as a What's Hot list for Biology. More info »

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Rank Topic Wikipedia views
1 Sex 136,129 Sparkline of topic views for 2 weeks
2 Biological classification 28,044 Sparkline of topic views for 2 weeks
3 Species 12,597 Sparkline of topic views for 2 weeks
4 Biology 11,130 Sparkline of topic views for 2 weeks
5 Ecology 8,142 Sparkline of topic views for 2 weeks
6 Life 7,671 Sparkline of topic views for 2 weeks
7 Pathology 6,190 Sparkline of topic views for 2 weeks
8 Animal testing 4,262 Sparkline of topic views for 2 weeks
9 Gender 4,120 Sparkline of topic views for 2 weeks
10 Vivisection 3,655 Sparkline of topic views for 2 weeks
11 Neuroscience 3,427 Sparkline of topic views for 2 weeks
12 Homology (biology) 3,232 Sparkline of topic views for 2 weeks
13 Adult 3,064 Sparkline of topic views for 2 weeks
14 Extinction event 2,644 Sparkline of topic views for 2 weeks
15 Biological hazard 1,576 Sparkline of topic views for 2 weeks
16 Biologist 1,301 Sparkline of topic views for 2 weeks
17 Biosafety level 1,112 Sparkline of topic views for 2 weeks
18 Birth 1,079 Sparkline of topic views for 2 weeks
19 Biological anthropology 1,045 Sparkline of topic views for 2 weeks
20 Type (biology) 1,015 Sparkline of topic views for 2 weeks
21 Biogeography 982 Sparkline of topic views for 2 weeks
22 Neuropathic pain 867 Sparkline of topic views for 2 weeks
23 Vasocongestion 798 Sparkline of topic views for 2 weeks
24 Wrinkle (skin) 666 Sparkline of topic views for 2 weeks
25 Biological life cycle 630 Sparkline of topic views for 2 weeks
26 Chemosynthesis 610 Sparkline of topic views for 2 weeks
27 Allometry 546 Sparkline of topic views for 2 weeks
28 Alpha taxonomy 546 Sparkline of topic views for 2 weeks
29 Specimen 521 Sparkline of topic views for 2 weeks
30 Human biology 499 Sparkline of topic views for 2 weeks
31 Chronobiology 483 Sparkline of topic views for 2 weeks
32 High-throughput screening 462 Sparkline of topic views for 2 weeks
33 Fluid compartments 412 Sparkline of topic views for 2 weeks
34 Levels of Organization (anatomy) 375 Sparkline of topic views for 2 weeks
35 Phenology 359 Sparkline of topic views for 2 weeks
36 Biological determinism 341 Sparkline of topic views for 2 weeks
37 Non-cellular life 318 Sparkline of topic views for 2 weeks
38 Legion (biology) 274 Sparkline of topic views for 2 weeks
39 Photoheterotroph 271 Sparkline of topic views for 2 weeks
40 Self-replication 268 Sparkline of topic views for 2 weeks
41 Catalogue of Life 255 Sparkline of topic views for 2 weeks
42 Philosophy of war 245 Sparkline of topic views for 2 weeks
43 Lek (biology) 232 Sparkline of topic views for 2 weeks
44 Chemical biology 228 Sparkline of topic views for 2 weeks
45 Fetal pig 206 Sparkline of topic views for 2 weeks
46 Pedosphere 205 Sparkline of topic views for 2 weeks
47 Biogeochemistry 170 Sparkline of topic views for 2 weeks
48 Natural material 168 Sparkline of topic views for 2 weeks
49 Supercompensation 164 Sparkline of topic views for 2 weeks
50 Transdifferentiation 146 Sparkline of topic views for 2 weeks
51 Biophotonics 145 Sparkline of topic views for 2 weeks
52 1000 Genomes Project 142 Sparkline of topic views for 2 weeks
53 Phase response curve 140 Sparkline of topic views for 2 weeks
54 Forensic biology 138 Sparkline of topic views for 2 weeks
55 Fibril 132 Sparkline of topic views for 2 weeks
56 Data sharing 129 Sparkline of topic views for 2 weeks
57 Overwintering 123 Sparkline of topic views for 2 weeks
58 Ethnobiology 120 Sparkline of topic views for 2 weeks
59 Function (biology) 119 Sparkline of topic views for 2 weeks
60 Paleobiology 113 Sparkline of topic views for 2 weeks
61 Hydrobiology 107 Sparkline of topic views for 2 weeks
62 Radioactivity in the life sciences 105 Sparkline of topic views for 2 weeks
63 Biocommunication (science) 103 Sparkline of topic views for 2 weeks
64 Indeterminate growth 102 Sparkline of topic views for 2 weeks
65 Mechanism (biology) 100 Sparkline of topic views for 2 weeks
66 Protein filament 98 Sparkline of topic views for 2 weeks
67 Biocybernetics 96 Sparkline of topic views for 2 weeks
68 Nastic movements 95 Sparkline of topic views for 2 weeks
69 Indirect DNA damage 94 Sparkline of topic views for 2 weeks
70 Light curve 87 Sparkline of topic views for 2 weeks
71 Biological naturalism 85 Sparkline of topic views for 2 weeks
72 General pathology 84 Sparkline of topic views for 2 weeks
73 Species description 80 Sparkline of topic views for 2 weeks
74 Infradian rhythm 79 Sparkline of topic views for 2 weeks
75 Mixed twins 79 Sparkline of topic views for 2 weeks
76 Worm-like chain 73 Sparkline of topic views for 2 weeks
77 Comparative physiology 68 Sparkline of topic views for 2 weeks
78 Biological thermodynamics 66 Sparkline of topic views for 2 weeks
79 Short linear motif 65 Sparkline of topic views for 2 weeks
80 Trace metal 63 Sparkline of topic views for 2 weeks
81 Neutralisation (immunology) 62 Sparkline of topic views for 2 weeks
82 Polyphenism 62 Sparkline of topic views for 2 weeks
83 Alternative biology 62 Sparkline of topic views for 2 weeks
84 Doubled haploidy 62 Sparkline of topic views for 2 weeks
85 Kin recognition 61 Sparkline of topic views for 2 weeks
86 Stress fiber 61 Sparkline of topic views for 2 weeks
87 Bionanoscience 61 Sparkline of topic views for 2 weeks
88 Taxonomic sequence 59 Sparkline of topic views for 2 weeks
89 Laboratory specimen 58 Sparkline of topic views for 2 weeks
90 Protocol (natural sciences) 56 Sparkline of topic views for 2 weeks
91 Photoprotection 55 Sparkline of topic views for 2 weeks
92 Biological exponential growth 55 Sparkline of topic views for 2 weeks
93 Phenomics 54 Sparkline of topic views for 2 weeks
94 Biotic index 54 Sparkline of topic views for 2 weeks
95 Biocontainment 53 Sparkline of topic views for 2 weeks
96 Halotolerance 51 Sparkline of topic views for 2 weeks
97 Glycobiology 51 Sparkline of topic views for 2 weeks
98 Photobiology 49 Sparkline of topic views for 2 weeks
99 Carnoy's solution 49 Sparkline of topic views for 2 weeks
100 Pioneer organism 47 Sparkline of topic views for 2 weeks
101 Homogenization (biology) 46 Sparkline of topic views for 2 weeks
102 Biological data 44 Sparkline of topic views for 2 weeks
103 Geobiology 43 Sparkline of topic views for 2 weeks
104 Computational epigenetics 43 Sparkline of topic views for 2 weeks
105 Hormogonium 42 Sparkline of topic views for 2 weeks
106 Energy budget 42 Sparkline of topic views for 2 weeks
107 Gaia spore 40 Sparkline of topic views for 2 weeks
108 Protistology 39 Sparkline of topic views for 2 weeks
109 DNA condensation 39 Sparkline of topic views for 2 weeks
110 Cross-fostering 38 Sparkline of topic views for 2 weeks
111 Brochosome 38 Sparkline of topic views for 2 weeks
112 Syntrophy 37 Sparkline of topic views for 2 weeks
113 Epiboly 37 Sparkline of topic views for 2 weeks
114 Entrainment (biomusicology) 37 Sparkline of topic views for 2 weeks
115 Thermolabile 35 Sparkline of topic views for 2 weeks
116 Eidonomy 35 Sparkline of topic views for 2 weeks
117 Vascular congestion 33 Sparkline of topic views for 2 weeks
118 Biosignal 33 Sparkline of topic views for 2 weeks
119 DNA Encoded Chemical Library 33 Sparkline of topic views for 2 weeks
120 Parabiosis 32 Sparkline of topic views for 2 weeks
121 Interpolation theory 31 Sparkline of topic views for 2 weeks
122 Archaeobiology 30 Sparkline of topic views for 2 weeks
123 Optimal virulence 29 Sparkline of topic views for 2 weeks
124 Test (biology) 28 Sparkline of topic views for 2 weeks
125 Evolution Day 27 Sparkline of topic views for 2 weeks
126 Permissiveness (biology) 27 Sparkline of topic views for 2 weeks
127 Gonadotropin preparations 27 Sparkline of topic views for 2 weeks
128 Perineuronal net 26 Sparkline of topic views for 2 weeks
129 The Seven Pillars of Life 25 Sparkline of topic views for 2 weeks
130 InforMax Inc 25 Sparkline of topic views for 2 weeks
131 Universality-diversity paradigm 24 Sparkline of topic views for 2 weeks
132 Comparator system 24 Sparkline of topic views for 2 weeks
133 Network biology 24 Sparkline of topic views for 2 weeks
134 Microbial intelligence 23 Sparkline of topic views for 2 weeks
135 Kinetic proofreading 23 Sparkline of topic views for 2 weeks
136 Analytical Profile Index 23 Sparkline of topic views for 2 weeks
137 BioSim 23 Sparkline of topic views for 2 weeks
138 Osteoimmunology 22 Sparkline of topic views for 2 weeks
139 Basic rest activity cycle 22 Sparkline of topic views for 2 weeks
140 Degeneracy (biology) 22 Sparkline of topic views for 2 weeks
141 Scotobiology 21 Sparkline of topic views for 2 weeks
142 Potassium spatial buffering 21 Sparkline of topic views for 2 weeks
143 Neuroendocrine carcinoma of the cervix 21 Sparkline of topic views for 2 weeks
144 Biositemap 20 Sparkline of topic views for 2 weeks
145 Folk biology 19 Sparkline of topic views for 2 weeks
146 Polychotomy 19 Sparkline of topic views for 2 weeks
147 Biorepository 19 Sparkline of topic views for 2 weeks
148 Standard metabolic rate 19 Sparkline of topic views for 2 weeks
149 Index to Scientific & Technical Proceedings 18 Sparkline of topic views for 2 weeks
150 Vegetal Rotation 17 Sparkline of topic views for 2 weeks
151 BIOSCI 16 Sparkline of topic views for 2 weeks
152 Gray's Paradox 16 Sparkline of topic views for 2 weeks
153 Structuralism (biology) 15 Sparkline of topic views for 2 weeks
154 Biological constraints 15 Sparkline of topic views for 2 weeks
155 Nunatak hypothesis 15 Sparkline of topic views for 2 weeks
156 Tethered particle motion 15 Sparkline of topic views for 2 weeks
157 Electric cell-substrate impedance sensing 15 Sparkline of topic views for 2 weeks
158 Osteofibrous dysplasia 15 Sparkline of topic views for 2 weeks
159 Technobiology 15 Sparkline of topic views for 2 weeks
160 Pluripotency (biological compounds) 15 Sparkline of topic views for 2 weeks
161 Bioclimatology 14 Sparkline of topic views for 2 weeks
162 High throughput biology 14 Sparkline of topic views for 2 weeks
163 Phototrophic biofilms 13 Sparkline of topic views for 2 weeks
164 Carbolabs 13 Sparkline of topic views for 2 weeks
165 Law of the gut 13 Sparkline of topic views for 2 weeks
166 Polony sequencing 13 Sparkline of topic views for 2 weeks
167 Specificity factor 12 Sparkline of topic views for 2 weeks
168 Natural Design 12 Sparkline of topic views for 2 weeks
169 International Code of Area Nomenclature (ICAN) 12 Sparkline of topic views for 2 weeks
170 Neutron velocity selector 12 Sparkline of topic views for 2 weeks
171 Neontology 11 Sparkline of topic views for 2 weeks
172 Immune-mediated inflammatory diseases 11 Sparkline of topic views for 2 weeks
173 Bio-geoengineering 11 Sparkline of topic views for 2 weeks
174 Compensatory growth 11 Sparkline of topic views for 2 weeks
175 DHSA 11 Sparkline of topic views for 2 weeks
176 WHO Expert Committee on Biological Standardization 11 Sparkline of topic views for 2 weeks
177 NatA Acetyltransferase 11 Sparkline of topic views for 2 weeks
178 Organography 10 Sparkline of topic views for 2 weeks
179 Organic molecular tracers 10 Sparkline of topic views for 2 weeks
180 Land lab 9 Sparkline of topic views for 2 weeks
181 Systematic and evolutionary biogeography association 9 Sparkline of topic views for 2 weeks
182 SeaSeep 9 Sparkline of topic views for 2 weeks
183 GEEC 9 Sparkline of topic views for 2 weeks
184 Distance sampling 9 Sparkline of topic views for 2 weeks
185 Recognition signal 9 Sparkline of topic views for 2 weeks
186 Dps (DNA-binding proteins from starved cells) 9 Sparkline of topic views for 2 weeks
187 Exopheromone 8 Sparkline of topic views for 2 weeks
188 Osmotic dehydration 8 Sparkline of topic views for 2 weeks
189 Anthocyanoside A 8 Sparkline of topic views for 2 weeks
190 Electrical penetration graph 7 Sparkline of topic views for 2 weeks
191 Reciprocal food sharing 7 Sparkline of topic views for 2 weeks
192 ITools Resourceome 7 Sparkline of topic views for 2 weeks
193 Anthropophily 7 Sparkline of topic views for 2 weeks
194 Polyphosphate-accumulating organisms 6 Sparkline of topic views for 2 weeks
195 Ocean Tracking Network 6 Sparkline of topic views for 2 weeks
196 Flapping counter-torque 6 Sparkline of topic views for 2 weeks
197 Goodwin model (biology) 6 Sparkline of topic views for 2 weeks
198 ChloroFilms 6 Sparkline of topic views for 2 weeks
199 Integrated Biosphere Simulator less than 5 views
200 Chemoton less than 5 views
201 On Genetic Interests less than 5 views
202 Canthal scales less than 5 views
203 Postbiological evolution less than 5 views
204 Highwire (protein) less than 5 views
205 Epixenosomes less than 5 views
206 Dexiothetism less than 5 views

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Encyclopedia

From Wikipedia, the free encyclopedia

Biology is the science of life. It is concerned with the characteristics and behaviors of organisms; how individuals come into existence, and how species evolve; and the interactions they have with each other and with their environment. Biology encompasses a broad spectrum of academic fields that are often considered independent disciplines, many of which are listed below as subcategories.

The main article for this category is Biology.

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The following 157 pages are in this category, out of 180 total. This list may not reflect recent changes (learn more).

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Study guide

Up to date as of January 14, 2010

From Wikiversity

Commons-logo.svg Search Wikimedia Commons for images, sounds and other media related to: Biology

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This category has the following 31 subcategories, out of 31 total.

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1911 encyclopedia

Up to date as of January 14, 2010
(Redirected to Biology article)

From LoveToKnow 1911

BIOLOGY (Gr. f31os, life). The biological sciences are those which deal with the phenomena manifested by living matter; and though it is customary and convenient to group apart such of these phenomena as are termed mental, and such of them as are exhibited by men in society, under the heads of psychology and sociology, yet it must be allowed that no natural boundary separates the subject matter of the latter sciences from that of biology. Psychology is inseparably linked with physiology; and the phases of social life exhibited by animals other than man, which sometimes curiously foreshadow human policy, fall strictly within the province of the biologist.

On the other hand, the biological sciences are sharply marked off from the abiological, or those which treat of the phenomena manifested by not-living matter, in so far as the properties of living matter distinguish it absolutely from all other kinds of things, and as the present state of knowledge furnishes us with no link between the living and the not-living.

These distinctive properties of living matter are i. Its chemical composition - containing, as it invariably does, one or more forms of a complex compound of carbon, hydrogen, pro- oxygen and nitrogen, the so-called protein or albumin The perties of (which has never yet been obtained except as a pro living duct of living bodies), united with a large proportion matter. of water, and forming the chief constituent of a substance which, in its primary unmodified state, is known as protoplasm. 2. Its universal disintegration and waste by oxidation; and its concomitant reintegration by the intussusception of new matter. A process of waste resulting from the decomposition of the molecules of the protoplasm, in virtue of which they break up into more highly oxidated products, which cease to form any part of the living body, is a constant concomitant of life. There is reason to believe that carbonic acid is always one of these waste products, while the others contain the remainder of the carbon, the nitrogen, the hydrogen and the other elements which may enter into the composition of the protoplasm.

The new matter taken in to make good this constant loss is either a ready-formed protoplasmic material, supplied by some other living being, or it consists of the elements of protoplasm, united together in simpler combinations, which consequently have to be built up into protoplasm by the agency of the living matter itself. In either case, the addition of molecules to those which already existed takes place, not at the surface of the living mass, but by interposition between the existing molecules of the latter. If the processes of disintegration and of reconstruction which characterize life balance one another, the size of the mass of living matter remains stationary, while, if the reconstructive process is the more rapid, the living body grows. But the increase of size which constitutes growth is the result of a process of molecular intussusception, and therefore differs altogether from the process of growth by accretion, which may be observed in crystals and is effected purely by the external addition of new matter - so that, in the well-known aphorism of Linnaeus, the word "grow" as applied to stones signifies a totally different process from what is called "growth" in plants and animals.

3. Its tendency to undergo cyclical changes. In the ordinary course of nature, all living matter proceeds from pre-existing living matter, a portion of the latter being detached and acquiring an independent existence. The new form takes on the characters of that from which it arose; exhibits the same power of propagating itself by means of an offshoot; and, sooner or later, like its predecessor, ceases to live, and is resolved into more highly oxidated compounds of its elements.

Thus an individual living body is not only constantly changing its substance, but its size and form are undergoing continual modifications, the end of which is the death and decay of that individual; the continuation of the kind being secured by the detachment of portions which tend to run through the same cycle of forms as the parent. No forms of matter which are either not living, or have not been derived from living matter, exhibit these three properties, nor any approach to the remarkable phenomena defined under the second and third heads. But in addition to these distinctive characters, living matter has some other peculiarities, the chief of which are the dependence of all its activities upon moisture and upon heat, within a limited range of temperature, and the fact that it usually possesses a certain structure or organization.

As has been said, a large proportion of water enters into the composition of all living matter; a certain amount of drying arrests vital activity, and the complete abstraction The properties of living matter are intimately related to temperature. Not only does exposure to heat sufficient to coagulate protein matter destroy life, by demolishing Life con- the molecular structure upon which life depends; but ditioned all vital activity, all phenomena of nutritive growth, by tern' movement and reproduction are possible only be- perature. tween certain limits of temperature. These limits may be set down as from a little above the freezing point of water to a little below the boiling point. It is to be noted, however, that these limits apply to the living matter itself, and many of the apparent exceptions are due to cases in which the living matter is enclosed in protective wrappings capable of resisting heat and cold. In many low organisms, such as the spores of bacteria, the thick, non-conducting wall may preserve the living protoplasm from subjection to external temperatures below freezing point, or above boiling point, but all the evidence goes to show that applications of such cold or heat, if prolonged or arranged so as to penetrate to the living matter, destroy life. In warm-blooded animals, such as birds and mammals, protective mechanisms for the regulation of temperature enable them to endure exposure to extreme heat or cold, but in such cases the actually living cells do not appreciably rise or fall in temperature.

A variation of a very few degrees in the blood itself produces death.

Recent investigations point to the conclusion that the immediate cause of the arrest of vitality, in the first place, and of its destruction, in the second, is the coagulation of certain substances in the protoplasm, and that the latter contains various coagulable matters, which solidify at different temperatures. And it remains to be seen, how far the death of any form of living matter, at a given temperature, depends on the destruction of its fundamental substance at that heat, and how far death is brought about by the coagulation of merely accessory compounds.

It may be safely said of all those living things which are large enough to enable us to trust the evidence of microscopes, that they are heterogeneous optically, and that their different parts, and especially the surface layer, as Life and contrasted with the interior, differh sicall and organiza- P Y ? Y Lion.

chemically; while, in most living things, mere hetero geneity is exchanged for a definite structure, whereby the body is distinguished into visibly different parts, which possess different powers or functions. Living things which present this visible structure are said to be organized; and so widely does organization obtain among living beings, that organized and living are not unfrequently used as if they were terms of co-extensive applicability. This, however, is not exactly accurate, if it be thereby implied that all living things have a visible organization, as there are numerous forms of living matter of which it cannot properly be said that they possess either a definite structure or permanently specialized organs: though, doubtless, the simplest particle of living matter must possess a highly complex molecular structure, which is far beyond the reach of vision.

The broad distinctions which, as a matter of fact, exist between every known form of living substance and every other component of the material world, justify the separation of the biological sciences from all others. But it must not be supposed that the differences between living and not-living matter are such as to justify the assumption that the forces at work in the one are different from those which are to be met with in the other. Considered apart from the phenomena of consciousness, the phenomena of life are all dependent upon the working of the same physical and chemical forces as those which are active in the rest of the world. It may be convenient to use the terms "vitality" and "vital force" to denote the causes of certain great groups of natural operations, as we employ the names of "electricity" and "electrical force" to denote others; but it ceases to be proper to do so, if such a name implies the absurd assumption that "electricity" and "vitality" are entities playing the part of efficient causes of electrical or vital phenomena. A mass of living protoplasm is simply a molecular machine of great complexity, the total results of the working of which, or its vital phenomena, depend - on the one hand, Life con- of this water is absolutely incompatible with either moister by a ctual or potential life. But many of the simpler P Y ler P forms of life may undergo desiccation to such an extent as to arrest their vital manifestations and convert them into the semblance of not-living matter, and yet remain potentially alive. That is to say, on being duly moistened they return to life again. And this revivification may take place after months, or even years, of arrested life.

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upon its construction, and, on the other, upon the energy supplied to it; and to speak of "vitality" as anything but the name of a series of operations is as if one should talk of the "horologity" of a clock.

Living matter, or protoplasm and the products of its metamorphosis, may be regarded under four aspects: r. It has a certain external and internal form, the latter being more usually called structure; 2. It occupies a certain position in space and in time; 3. It is the subject of the operation of certain forces in virtue of which it undergoes internal changes, modifies external objects, and is modified by them; and 4. Its form, place and powers are the effects of certain causes.

In correspondence with these four aspects of its subject, biology is logically divisible into four chief subdivisions - I. Morphology; II. Distribution; III. Physiology; IV.

Aetiology.

Various accidental circumstances, however, have brought it about that the actual distribution of scientific work does not correspond with the logical subdivisions of biology. The difference in technical methods and the historical evolution of teaching posts (for in all civilized countries the progress of biological knowledge has been very closely associated with the existence of institutions for the diffusion of knowledge and for professional education) have been the chief contributory causes to this practical confusion. Details of the morphology of plants will be found in the articles relating to the chief groups of plants, those of animals in the corresponding articles on groups of animals, while the classification of animals adopted in this work will be found in the article ZOOLOGY. Distribution is treated of under ZOOLOGICAL DISTRIBUTION, PLANKTON, PALAEONTOLOGY and PLANTS: Distribution. PHYSIOLOGY and its allied articles deal with the subject generally and in relation to man, while the special physiology of plants is dealt with in a section of the article PLANTS. Aetiology is treated of under the heading EVOLUTION. But practical necessity has given rise to the existence of many other divisions; see CYTOLOGY, for the structure of cells; EMBRYOLOGY, for the development of individual organisms; HEREDITY and REPRODUCTION, for the relations between parents and offspring. (T. H. H.; P. C. M.)


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Wiktionary

Up to date as of January 15, 2010

Definition from Wiktionary, a free dictionary

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Articles on this topic in other Wikimedia projects can be found at: Wikimedia Commons Category Biology
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The following is a list of words related to biology.


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Subcategories

This category has the following 38 subcategories, out of 269 total.

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Entries in category “Biology”

The following 162 pages are in this category, out of 1,772 total.

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Wikibooks

Up to date as of January 23, 2010

From Wikibooks, the open-content textbooks collection

This category contains books on biology: the science that studies living organisms. More specifically, it examines the structure, function, growth, origin, evolution, distribution, and classification of all living things.

Related categories

The following 23 related categories may be of interest, out of 23 total.

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