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The nitrogen fixing Rhizobia are an interesting case, wherein conjugative elements naturally engage in inter-kingdom conjugation. Such elements as the Agrobacterium Ti or Ri plasmids contain elements that can transfer to plant cells. Transferred genes enter the plant cell nucleus and effectively transform the plant cells into factories for the production of opines, which the bacteria use as carbon and energy sources. Infected plant cells form crown gall or root tumors. The Ti and Ri plasmids are thus endosymbionts of the bacteria, which are in turn endosymbionts (or parasites) of the infected plant.

What happens to infected plant cells?
Answer: end
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The World Bank reported in February 2009 that the Arab World was far less severely affected by the credit crunch. With generally good balance of payments positions coming into the crisis or with alternative sources of financing for their large current account deficits, such as remittances, Foreign Direct Investment (FDI) or foreign aid, Arab countries were able to avoid going to the market in the latter part of 2008. This group is in the best position to absorb the economic shocks. They entered the crisis in exceptionally strong positions. This gives them a significant cushion against the global downturn. The greatest impact of the global economic crisis will come in the form of lower oil prices, which remains the single most important determinant of economic performance. Steadily declining oil prices would force them to draw down reserves and cut down on investments. Significantly lower oil prices could cause a reversal of economic performance as has been the case in past oil shocks. Initial impact will be seen on public finances and employment for foreign workers.

What will have the greatest impact on the global economic crisis?
Answer: lower oil prices
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Ashkenazi Jews have a noted history of achievement in Western societies in the fields of exact and social sciences, literature, finance, politics, media, and others. In those societies where they have been free to enter any profession, they have a record of high occupational achievement, entering professions and fields of commerce where higher education is required. Ashkenazi Jews have won a large number of the Nobel awards. While they make up about 2% of the U.S. population, 27% of United States Nobel prize winners in the 20th century, a quarter of Fields Medal winners, 25% of ACM Turing Award winners, half the world's chess champions, including 8% of the top 100 world chess players, and a quarter of Westinghouse Science Talent Search winners have Ashkenazi Jewish ancestry.

What percentage of the US population is comprised of Ashkenazi Jews?
Answer:
2%