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- Rosalind Franklin (9829 bytes)
2: ...apher]] who made important contributions to the understanding of the fine structures of [[coal]], [[DN...
8: ...h carbon fibres and was the basis of her doctoral degree in physical chemistry that she earned in 1945...
9: ...es Mering, her mentor, had been unhappy about her decision to leave and refused to put his name on the...
15: ...t 'Strictly speaking, our model was not finally ''decisively'' proved until some 25 or so years later'...
18: ... draft paper describing the structure as a double helix when Crick and Watson produced theirs. - Ear (6659 bytes)
1: ...ge:Ear.jpg|thumb|A left [[human]] ear. Image provided by [https://classroomclipart.com Classroom Clip ...
3: An '''ear''' is an organ used by an animal to detect [[sound]]. The term may refer to the entire ...
7: ...ncluding [[human]]s, have two ears, one on each side of the head.
10: ... waves. Many [[mammal]]s can move the pinna in order to focus their hearing in a certain direction, i...
12: ...umb|250px|left| Photography of a baby. Image provided by [http://classroomclipart.com Classroom Clipar... - Medieval fortification (8517 bytes)
1: ...aspect of [[Medieval technology]] that covers the development of [[fortification]] construction and us...
5: ...hpost), is a [[fort]], a [[camp]] and the logical development of a [[Fortification|fortified enclosure...
9: ...ure of the walls of a medieval town or city would depend on the resources available for building them,...
11: ...e wall. The word is a [[medieval]] and later one, derived from the classical [[Latin]] ''post murum'',...
13: ...he end of the [[sixteenth century]], the word had developed further in common use, into ''pomery''. - Cell (biology) (28190 bytes)
3: The [[cell theory]], first developed in the [[19th century]], states that all [...
15: ...nergy stored in organic molecules. This energy is derived from [[metabolic pathway]]s.
21: ...mes (''dark blue''). The drawing on the ''right'' demonstrates how bacterial DNA is housed in a struct...
23: ...ms) that function and survive more or less independently, through ''colonial'' forms with cells living...
34: ...these primary components of the cell then briefly describe their function. - DNA (29095 bytes)
1: ...paceFilling.jpg|thumb|right|125px|Space-filling model of a section of DNA molecule]]
3: ...specifying the [[developmental biology|biological development]] of all cellular forms of [[life]] (and...
8: ... may be a precursor to a generation of electronic devices and computers, but what are the electronic p...
10: ...ning that this is not necessarily a very accurate description, and that it's only meant as a generic o...
12: ...m not saying is happening here) is also to be avoided. --[[User:Lexor|Lexor]]|[[User talk:Lexor|Talk]] - Helicopter (20080 bytes)
1: ...derived from the [[Greek language|Greek]] words ''helix'' (spiral) and ''pteron'' (wing). The engine-driv...
3: ...] Company (USA) [[Robinson R44|R44]], a four seat development of the [[Robinson R22|R22]].]]
5: ...ject only to refuelling facilities and load/altitude limitations, a helicopter can travel to any locat...
9: ...ransportation, casualty evacuation (including [[MEDEVAC]], and [[search and rescue|air/sea/mountain re...
13: ...ry AD]] book in China that described some of the ideas in a rotary wing aircraft. - Cell (29541 bytes)
3: The [[cell theory]], first developed in the [[19th century]], states that all [...
15: ...nergy stored in organic molecules. This energy is derived from [[metabolic pathway]]s.
21: ...mes (''dark blue''). The drawing on the ''right'' demonstrates how bacterial DNA is housed in a struct...
23: ...ms) that function and survive more or less independently, through ''colonial'' forms with cells living...
34: ...these primary components of the cell then briefly describe their function. - Virus (17572 bytes)
1: ...her [[DNA]] or [[RNA]] (depicted as blue), surrounded by a protein coat, or [[capsid]], with or withou...
3: ...age its [[genetic material]], but for proteins needed by the virus during [[lysogenic cycle|lysogenic]...
7: ...]] and other noxious things. Today it is used to describe the biological viruses discussed above and ...
12: ...ites, and have no form which can reproduce independently of their host. Like most parasites, they have...
14: ...ned, it can be strongly argued that viruses are indeed alive. Some small viruses are more efficient t... - Sulfur (18059 bytes)
1: {{Elementbox_header | number=16 | symbol=S | name=sulfur | left=[[ph...
10: {{Elementbox_density_gpcm3nrt | (alpha) 2.08 }}
11: {{Elementbox_density_gpcm3nrt | (beta) 1.96 }}
12: {{Elementbox_density_gpcm3nrt | (gamma) 1.92 }}
13: {{Elementbox_densityliq_gpcm3mp | 1.819 }} - Genetics (12654 bytes)
1: ...ganism]]s. The word genetics was first applied to describe the study of inheritance and the science of...
3: ...ts and animals. In modern research, genetics provides important tools in the investigation of the func...
5: ...g, although, in many instances, do not completely determine, the final [[phenotype]] of the organism.
6: ...uild a particular [[protein]], as in ''the gene codes for the protein''.
7: ...ple, a single gene may produce multiple products, depending on how its [[transcription (genetics)|tran... - History of the periodic table (7005 bytes)
4: ...]], a philosopher, theorised that everything is made up of a mixture of one or more of four [[element]...
5: ...|thumb|150px|left|Chemistry Clipart .Clipart provided by
10: ...atterns in the way chemicals reacted and began to devise ways to classify the elements.
15: ...mpiling these, D?einer proposed that nature was made of triads of elements. He inferred that in a tria...
18: ...yond triads. During this time, [[fluorine]] was added to the halogen group and [[oxygen]], [[sulfur]],... - Flagellum (8951 bytes)
4: ...milar, but are different in many details and considered non-homologous. [[Eukaryote|Eukaryotic]] flag...
8: ...ates with [[peptidoglycan]] layer, M ring is imbedded in the [[plasma membrane]], and the S ring is di...
18: ...te is random. The length of the run state is extended when the bacteria moves through a favorable grad...
24: ... (e.g., [[Carl Woese|Woese]]), or a just a highly-derived bacterium with heavy adaptation to [[extremo...
26: ...Both flagella consist of filaments extending outside of the cell, and rotate to propel the cell. - Snail (3838 bytes)
9: [[Image:Snail marine.jpg||thumb|250px|Image provided by [http://classroomclipart.com Classroom Clip A...
10: ...e scattered throughout groups that primarily include snails. Snails are found in freshwater, marine, ...
18: ...tative matter. Carnivorous snails, such as the [[Decollate Snail]] feed on other snails. Snails eat ...
19: [[Image:Snail 2.jpg|thumb|250px|Image provided by [http://classroomclipart.com Classroom Clip A...
22: ...ducing both [[sperm]] and [[egg]]s. Prolific breeders, snails exchange sperm with one another to [[fe... - Screw (22059 bytes)
6: ...rmed on its surface. Its main uses are as a threaded [[fastener]] used to hold objects together, and ...
9: ...ly used throughout the [[Mediterranean]] world in devices such as [[oil]] and [[wine]] presses. Metal...
11: ... a screw-cutting [[lathe]] in [[1797]]; a similar device was patented by [[David Wilkinson]] in the [[...
15: ==Threaded fastener==
16: ...rmed on it. The thread mates with a complementary helix in the material. - Root (9635 bytes)
3: ...eaves, and therefore also lacks [[Node (botany)|nodes]]. There are also important internal structural ...
7: ...[Meristem|apical meristem]]'''. The root cap provides mechanical protection to the meristem cells as t...
9: ...he process by which water is absorbed into the epidermal cells from the soil is known as '''''[[osmosi...
11: ...er can only flow in one direction through the endodermis: in towards the center of the root, rather th...
13: ...[[stele]]''' consists of the cells inside the endodermis. The outer part, known as the '''pericycle'''... - Culture of Ireland (27885 bytes)
2: ...is far from monolithic. Many notable cultural divides exist between the rural people and city dwellers...
8: ...ives in Dublin, the cattle population is of the order of 6.7 million. The total population of humans o...
12: ...hich sporting rivalries and other forms of local identity are built and most people feel a strong sens...
16: ...nd Commission]]. One consequence of this is the widely-recognised cultural phenomenon of "land hunger"...
21: ...res, the first cathedrals, such as the Viking-founded and Norman-rebuilt [[Christchurch Cathedral, Dub... - Snails (3374 bytes)
9: [[Image:Snail marine.jpg||thumb|250px|Image provided by [http://classroomclipart.com Classroom Clip A...
10: ...e scattered throughout groups that primarily include snails. Snails are found in freshwater, marine, ...
18: ...tative matter. Carnivorous snails, such as the [[Decollate Snail]] feed on other snails. Snails eat ...
19: [[Image:Snail 2.jpg|thumb|250px|Image provided by [http://classroomclipart.com Classroom Clip A...
22: ...ducing both [[sperm]] and [[egg]]s. Prolific breeders, snails exchange sperm with one another to [[fe... - History of chemistry (8174 bytes)
3: ...|thumb|150px|left|Chemistry Clipart .Clipart provided by
6: ==The vitalism debate and organic chemistry==
8: ...], and other synthetic [[dye]]s, as well as the widely used drug [[aspirin]]. The discovery also contr...
12: ...planation of [[Brownian motion]] in the first decade of the [[20th century]].
14: ... the atom as a branch of [[physics]], but was awarded the [[Nobel Prize]] in chemistry, not physics, f... - Protein (17280 bytes)
1: ... by [[Max Perutz]] and [[John Kendrew|Sir John Cowdery Kendrew]] in 1958, which led to them receiving ...
2: ...that consists of [[amino acid]]s joined by [[peptide bond]]s. Proteins are essential to the structure ...
3: ...n]]. Still more functions filled by proteins include [[antibody|immune response]] and the storage and ...
5: ...f bio-[[macromolecules]], alongside [[polysaccharide]]s, [[lipid]]s, and [[nucleic acid]]s, that make ...
7: Most natural proteins are encoded by [[DNA]]. DNA is [[transcription (genetics)|t... - Scientific method (40667 bytes)
1: ...of building a supportable, [[evidence]]-based [[understanding]] of our natural [[world]].
6: ...ds for scientific inquiry is indivisible from the development of science.
7: ...seased demons and other superstition, there is evidence of traditional empiricism.
9: ...s we experience it reaches an extreme in [[Parmenides]] who argued that the world is one and that chan...
11: ...ricism]]. For Aristotle, the Platonic, universal ideal is to be found in particular things, what he ca...
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