dkoterwa/mlqa_filtered huggingface dataset:
All organisms on Earth are descended from a common ancestor or ancestral gene pool. Current species are a stage in the process of evolution, with their diversity the product of a long series of speciation and extinction events. The common descent of organisms was first deduced from four simple facts about organisms: First, they have geographic distributions that cannot be explained by local adaptation. Second, the diversity of life is not a set of completely unique organisms, but organisms that share morphological similarities. Third, vestigial traits with no clear purpose resemble functional ancestral traits and finally, that organisms can be classified using these similarities into a hierarchy of nested groups—similar to a family tree. However, modern research has suggested that, due to horizontal gene transfer, this "tree of life" may be more complicated than a simple branching tree since some genes have spread independently between distantly related species.

Question: What do organisms share?
Answer: morphological similarities
An individual organism's phenotype results from both its genotype and the influence from the environment it has lived in. A substantial part of the phenotypic variation in a population is caused by genotypic variation. The modern evolutionary synthesis defines evolution as the change over time in this genetic variation. The frequency of one particular allele will become more or less prevalent relative to other forms of that gene. Variation disappears when a new allele reaches the point of fixation—when it either disappears from the population or replaces the ancestral allele entirely.Natural selection will only cause evolution if there is enough genetic variation in a population. Before the discovery of Mendelian genetics, one common hypothesis was blending inheritance. But with blending inheritance, genetic variance would be rapidly lost, making evolution by natural selection implausible. The Hardy–Weinberg principle provides the solution to how variation is maintained in a population with Mendelian inheritance. The frequencies of alleles (variations in a gene) will remain constant in the absence of selection, mutation, migration and genetic drift.Variation comes from mutations in the genome, reshuffling of genes through sexual reproduction and migration between populations (gene flow). Despite the constant introduction of new variation through mutation and gene flow, most of the genome of a species is identical in all individuals of that species. However, even relatively small differences in genotype can lead to dramatic differences in phenotype: for example, chimpanzees and humans differ in only about 5% of their genomes.

Question: What is evolution according to modern evolution synthesis?
Answer: the change over time

Question: Why is there a variation in the phentotype?
Answer: genotypic variation

Question: How were new variations introduced?
Answer: mutation and gene flow

Question: The Hardy-Weinberg principle solves variation maintenance in a population of what descent?
Answer: Mendelian
Gene transfer between species includes the formation of hybrid organisms and horizontal gene transfer. Horizontal gene transfer is the transfer of genetic material from one organism to another organism that is not its offspring; this is most common among bacteria. In medicine, this contributes to the spread of antibiotic resistance, as when one bacteria acquires resistance genes it can rapidly transfer them to other species. Horizontal transfer of genes from bacteria to eukaryotes such as the yeast Saccharomyces cerevisiae and the adzuki bean weevil Callosobruchus chinensis has occurred. An example of larger-scale transfers are the eukaryotic bdelloid rotifers, which have received a range of genes from bacteria, fungi and plants. Viruses can also carry DNA between organisms, allowing transfer of genes even across biological domains.Large-scale gene transfer has also occurred between the ancestors of eukaryotic cells and bacteria, during the acquisition of chloroplasts and mitochondria. It is possible that eukaryotes themselves originated from horizontal gene transfers between bacteria and archaea.

Question: What is a possibility in the origination of eukaryotes?
Answer: from horizontal gene transfers between bacteria and archaea
Highly energetic chemistry is thought to have produced a self-replicating molecule around 4 billion years ago, and half a billion years later the last common ancestor of all life existed. The current scientific consensus is that the complex biochemistry that makes up life came from simpler chemical reactions. The beginning of life may have included self-replicating molecules such as RNA and the assembly of simple cells.

Question: Complex biochemistry s said to have been made life through what?
Answer: simpler chemical reactions

Question: How many billion years ago did highly energetic chemistry produce a self-replicating molecule?
Answer: 4
In asexual organisms, genes are inherited together, or linked, as they cannot mix with genes of other organisms during reproduction. In contrast, the offspring of sexual organisms contain random mixtures of their parents' chromosomes that are produced through independent assortment. In a related process called homologous recombination, sexual organisms exchange DNA between two matching chromosomes. Recombination and reassortment do not alter allele frequencies, but instead change which alleles are associated with each other, producing offspring with new combinations of alleles. Sex usually increases genetic variation and may increase the rate of evolution.

Question: Does recombination change allele's frequency?
Answer: do not alter

Question: What kind of organisms have genes that are linked together?
Answer: asexual
More recently, evidence for common descent has come from the study of biochemical similarities between organisms. For example, all living cells use the same basic set of nucleotides and amino acids. The development of molecular genetics has revealed the record of evolution left in organisms' genomes: dating when species diverged through the molecular clock produced by mutations. For example, these DNA sequence comparisons have revealed that humans and chimpanzees share 98% of their genomes and analysing the few areas where they differ helps shed light on when the common ancestor of these species existed.

Question: What has the development of molecular genetics brought to light?
Answer: the record of evolution left in organisms' genomes
Mutations are changes in the DNA sequence of a cell's genome. When mutations occur, they may alter the product of a gene, or prevent the gene from functioning, or have no effect. Based on studies in the fly Drosophila melanogaster, it has been suggested that if a mutation changes a protein produced by a gene, this will probably be harmful, with about 70% of these mutations having damaging effects, and the remainder being either neutral or weakly beneficial.Mutations can involve large sections of a chromosome becoming duplicated (usually by genetic recombination), which can introduce extra copies of a gene into a genome. Extra copies of genes are a major source of the raw material needed for new genes to evolve. This is important because most new genes evolve within gene families from pre-existing genes that share common ancestors. For example, the human eye uses four genes to make structures that sense light: three for colour vision and one for night vision; all four are descended from a single ancestral gene.New genes can be generated from an ancestral gene when a duplicate copy mutates and acquires a new function. This process is easier once a gene has been duplicated because it increases the redundancy of the system; one gene in the pair can acquire a new function while the other copy continues to perform its original function. Other types of mutations can even generate entirely new genes from previously noncoding DNA.The generation of new genes can also involve small parts of several genes being duplicated, with these fragments then recombining to form new combinations with new functions. When new genes are assembled from shuffling pre-existing parts, domains act as modules with simple independent functions, which can be mixed together to produce new combinations with new and complex functions. For example, polyketide synthases are large enzymes that make antibiotics; they contain up to one hundred independent domains that each catalyse one step in the overall process, like a step in an assembly line.

Question: How many genes will change their function while another continues as normal?
Answer: one gene
Natural selection can act at different levels of organisation, such as genes, cells, individual organisms, groups of organisms and species. Selection can act at multiple levels simultaneously. An example of selection occurring below the level of the individual organism are genes called transposons, which can replicate and spread throughout a genome. Selection at a level above the individual, such as group selection, may allow the evolution of cooperation, as discussed below.

Question: How many levels can selection act as at the same time?
Answer: multiple

Question: What can transposons move through?
Answer: a genome
Natural selection within a population for a trait that can vary across a range of values, such as height, can be categorised into three different types. The first is directional selection, which is a shift in the average value of a trait over time—for example, organisms slowly getting taller. Secondly, disruptive selection is selection for extreme trait values and often results in two different values becoming most common, with selection against the average value. This would be when either short or tall organisms had an advantage, but not those of medium height. Finally, in stabilising selection there is selection against extreme trait values on both ends, which causes a decrease in variance around the average value and less diversity. This would, for example, cause organisms to eventually have a similar height.

Question: What is disruptive selection?
Answer: selection for extreme trait values
Prokaryotes inhabited the Earth from approximately 3–4 billion years ago. No obvious changes in morphology or cellular organisation occurred in these organisms over the next few billion years. The eukaryotic cells emerged between 1.6–2.7 billion years ago. The next major change in cell structure came when bacteria were engulfed by eukaryotic cells, in a cooperative association called endosymbiosis. The engulfed bacteria and the host cell then underwent coevolution, with the bacteria evolving into either mitochondria or hydrogenosomes. Another engulfment of cyanobacterial-like organisms led to the formation of chloroplasts in algae and plants.The history of life was that of the unicellular eukaryotes, prokaryotes and archaea until about 610 million years ago when multicellular organisms began to appear in the oceans in the Ediacaran period. The evolution of multicellularity occurred in multiple independent events, in organisms as diverse as sponges, brown algae, cyanobacteria, slime moulds and myxobacteria. In January 2016, scientists reported that, about 800 million years ago, a minor genetic change in a single molecule called GK-PID may have allowed organisms to go from a single cell organism to one of many cells.Soon after the emergence of these first multicellular organisms, a remarkable amount of biological diversity appeared over approximately 10 million years, in an event called the Cambrian explosion. Here, the majority of types of modern animals appeared in the fossil record, as well as unique lineages that subsequently became extinct. Various triggers for the Cambrian explosion have been proposed, including the accumulation of oxygen in the atmosphere from photosynthesis.About 500 million years ago, plants and fungi colonised the land and were soon followed by arthropods and other animals. Insects were particularly successful and even today make up the majority of animal species. Amphibians first appeared around 364 million years ago, followed by early amniotes and birds around 155 million years ago (both from "reptile"-like lineages), mammals around 129 million years ago, homininae around 10 million years ago and modern humans around 250,000 years ago. However, despite the evolution of these large animals, smaller organisms similar to the types that evolved early in this process continue to be highly successful and dominate the Earth, with the majority of both biomass and species being prokaryotes.

Question: What happened to prokaryotes from 3-4 billion years ago?
Answer: No obvious changes in morphology or cellular organisation

Question: How long ago did the eukaryotic cells emerge?
Answer: 1.6–2.7 billion years ago

Question: How are insects described in animal species?
Answer: make up the majority of animal species
Since then, the modern synthesis has been further extended to explain biological phenomena across the full and integrative scale of the biological hierarchy, from genes to species. One extension, known as evolutionary developmental biology and informally called "evo-devo," emphasises how changes between generations (evolution) acts on patterns of change within individual organisms (development). Since the beginning of the 21st century and in light of discoveries made in recent decades, some biologists have argued for an extended evolutionary synthesis, which would account for the effects of non-genetic inheritance modes, such as epigenetics, parental effects, ecological inheritance and cultural inheritance, and evolvability.

Question: Why was the concept of synthesis extended?
Answer: to explain biological phenomena across the full and integrative scale of the biological hierarchy, from genes to species
The proposal that one type of organism could descend from another type goes back to some of the first pre-Socratic Greek philosophers, such as Anaximander and Empedocles. Such proposals survived into Roman times. The poet and philosopher Lucretius followed Empedocles in his masterwork De rerum natura (On the Nature of Things).

Question: Who did Lucretius study for his masterwork?
Answer: Empedocles
Airbus SE (; French: [ɛʁbys] (listen); German: [ˈɛːɐ̯bʊs]; Spanish: [ˈeiɾβus]), from 2000 to 2014 known as the European Aeronautic Defence and Space Company (EADS), is an European multinational aerospace corporation that stood as the world's second biggest aerospace and defence company in 2018. Registered in the Netherlands and trading shares in France, Germany and Spain, Airbus designs, manufactures and sells civil and military aerospace products worldwide and manufactures in the European Union and various other countries. The company has three divisions: Commercial Aircraft, Defence and Space, and Helicopters, the third being the largest in its industry in terms of revenues and turbine helicopter deliveries.The company's main civil aeroplane business is based in Blagnac, France, a suburb of Toulouse, with production and manufacturing facilities mostly in the European Union (France, Germany, Spain, United Kingdom) but also in China and the United States. Final assembly production is based in Toulouse, France; Hamburg, Germany; Seville, Spain; Tianjin, China, and Mobile, Alabama, United States. The company produces and markets the first commercially viable digital fly-by-wire airliner, the Airbus A320, and the world's largest passenger airliner, the A380. The 12,000th aircraft, an A220, was delivered to Delta Air Lines on 20 May 2019. By October 2016, the global Airbus fleet have performed more than 110 million flights, totaling over 215 billion kilometres and carrying 12 billion passengers.Airbus's corporate headquarters is located in Leiden, Netherlands, and the main office is located in Toulouse, France. The company is led by CEO Guillaume Faury and is a component of the Euro Stoxx 50 stock market index.

Question: Where is final assembly located in Europe?
Answer: Toulouse, France; Hamburg, Germany; Seville, Spain
Airbus argues that the military contracts awarded to Boeing, the second largest U.S. defence contractor, are in effect a form of subsidy, such as the controversy surrounding the Boeing KC-767 military contracting arrangements. The significant U.S. government support of technology development via NASA also provides significant support to Boeing, as do the large tax breaks offered to Boeing, which some people claim are in violation of the 1992 agreement and WTO rules. In its recent products such as the 787, Boeing has also been offered direct financial support from local and state governments.In January 2005 the European Union and United States trade representatives, Peter Mandelson and Robert Zoellick respectively, agreed to talks aimed at resolving the increasing tensions. These talks were not successful with the dispute becoming more acrimonious rather than approaching a settlement.WTO ruled in August 2010 and in May 2011 that Airbus had received improper government subsidies through loans with below market rates from several European countries. In a separate ruling in February 2011, WTO found that Boeing had received local and federal aid in violation of WTO rules.

Question: who is assisting Boeing financially?
Answer: local and state governments
Airbus has committed to the "Flightpath 2050", an aviation industry plan to reduce noise, CO2, and NOx emissions.Airbus was the first aerospace business to become ISO 14001 certified, in January 2007; this is a broader certification covering the whole organisation, not just the aircraft it produces.In association with Honeywell and JetBlue Airbus has developed a biofuel to reduce pollution and dependence on fossil fuels, claiming that this has the potential to replace up to a third of the world's aviation fuel. Algae-based biofuel absorbs carbon dioxide during growth and does not compete with food production. This alternative may be commercially available by 2030 but algae and other vegetation-based fuels are in an early stage of development and fuel-bearing algae has been expensive to develop.  Airbus offers delivery flights to airlines using a 10% biofuel blend in standard engines. The fuel does not cut carbon emissions but is free of sulphur emissions and demonstrates that the fuel could be used in commercial flights in unmodified engines.

Question: What type of emissions are still present?
Answer: carbon emissions
Airbus opened an assembly plant in Tianjin, People's Republic of China for its A320 series airliners in 2009. Airbus started constructing a $350 million component manufacturing plant in Harbin, China in July 2009, which will employ 1,000 people. Scheduled to be operated by the end of 2010, the 30,000 square metre plant will manufacture composite parts and assemble composite work-packages for the A350 XWB, A320 families and future Airbus programmes. Harbin Aircraft Industry Group Corporation, Hafei Aviation Industry Company Ltd, AviChina Industry & Technology Company and other Chinese partners hold the 80% stake of the plant while Airbus control the remaining 20%.North America is an important region to Airbus in terms of both aircraft sales and suppliers. 2,000 of the total of approximately 5,300 Airbus jetliners sold by Airbus around the world, representing every aircraft in its product line from the 107-seat A318 to the 565-passenger A380, are ordered by North American customers. According to Airbus, US contractors, supporting an estimated 120,000 jobs, earned an estimated $5.5 billion (2003) worth of business. For example, one version of the A380 has 51% American content in terms of work share value.

Question: What type of jetliner has a large work share value?
Answer: A380
Boeing has continually protested over "launch aid" and other forms of government aid to Airbus, while Airbus has argued that Boeing receives illegal subsidies through military and research contracts and tax breaks.In July 2004 former Boeing CEO Harry Stonecipher accused Airbus of abusing a 1992 bilateral EU-US agreement providing for disciplines for large civil aircraft support from governments. Airbus is given reimbursable launch investment (RLI), called "launch aid" by the US, from European governments with the money being paid back with interest plus indefinite royalties, but only if the aircraft is a commercial success. Airbus contends that this system is fully compliant with the 1992 agreement and WTO rules. The agreement allows up to 33% of the programme cost to be met through government loans which are to be fully repaid within 17 years with interest and royalties. These loans are held at a minimum interest rate equal to the cost of government borrowing plus 0.25%, which would be below market rates available to Airbus without government support. Airbus claims that since the signature of the EU-US agreement in 1992, it has repaid European governments more than U.S.$6.7 billion and that this is 40% more than it has received.

Question: What is the investment money Airbus is being given by European governments called?
Answer: launch aid

Question: How is Airbus funded?
Answer: through government loans
Building on its success, Airbus launched the A320, particularly notable for being the first commercial jet to use a fly-by-wire control system. The A320 has been, and continues to be, a great commercial success. The A318 and A319 are shorter derivatives with some of the latter under construction for the corporate business jet market as Airbus Corporate Jets. A stretched version is known as the A321. The A320 family's primary competitor is the Boeing 737 family.The longer-range widebody products— the twin-jet A330 and the four-engine A340— have efficient wings, enhanced by winglets. The Airbus A340-500 has an operating range of 16,700 kilometres (9,000 nmi), the second longest range of any commercial jet after the Boeing 777-200LR (range of 17,446 km or 9,420 nautical miles).All Airbus aircraft developed since then have cockpit systems similar to the A320, making it easier to train crew. Production of the four-engine A340 was ended in 2011 due to lack of sales compared to its twin-engine counterparts, such as the Boeing 777.Airbus is studying a replacement for the A320 series, tentatively dubbed NSR, for "New Short-Range aircraft". Those studies indicated a maximum fuel efficiency gain of 9–10% for the NSR. Airbus however opted to enhance the existing A320 design using new winglets and working on aerodynamical improvements. This "A320 Enhanced" should have a fuel efficiency improvement of around 4–5%, shifting the launch of an A320 replacement to 2017–2018.

Question: How many engines does the A340 have?
Answer: four

Question: How much improve fuel efficiency should the A320 Enhanced have?
Answer: 4–5%
In January 1999 Airbus established a separate company, Airbus Military SAS, to undertake development and production of a turboprop-powered tactical transport aircraft, the Airbus Military A400M. The A400M is being developed by several NATO members, Belgium, France, Germany, Luxembourg, Spain, Turkey, and the UK, as an alternative to relying on foreign aircraft for tactical airlift capacity, such as the Ukrainian Antonov An-124 Ruslan and the American C-130 Hercules. The A400M project has suffered several delays; Airbus has threatened to cancel the development unless it receives state subsidies.Pakistan placed an order for the Airbus A310 MRTT in 2008, which will be a conversion of an existing airframe as the base model A310 is no longer in production. On 25 February 2008 Airbus won an order for three air refuelling MRTT aircraft, adapted from A330 passenger jets, from the United Arab Emirates. On 1 March 2008 a consortium of Airbus and Northrop Grumman had won a $35 billion contract to build the new in-flight refuelling aircraft KC-45A, a US built version of the MRTT, for the USAF. The decision drew a formal complaint from Boeing, and the KC-X contract was cancelled to begin bidding afresh.

Question: The NATO is made up of which countries?
Answer: Belgium, France, Germany, Luxembourg, Spain, Turkey, and the UK