Question: While the majority of flowers are perfect or hermaphrodite (having both pollen and ovule producing parts in the same flower structure), flowering plants have developed numerous morphological and physiological mechanisms to reduce or prevent self-fertilization. Heteromorphic flowers have short carpels and long stamens, or vice versa, so animal pollinators cannot easily transfer pollen to the pistil (receptive part of the carpel). Homomorphic flowers may employ a biochemical (physiological) mechanism called self-incompatibility to discriminate between self and non-self pollen grains. In other species, the male and female parts are morphologically separated, developing on different flowers.
Try to answer this question if possible: Why did long stamens develop numerous morphological and physiological mechanisms?
Answer: unanswerable
Question: During the fighting, the Communards killed c.500 people, including the Archbishop of Paris, and burned down many government buildings, including the Tuileries Palace and the Hotel de Ville. Communards captured with weapons were routinely shot by the army and Government troops killed from 7,00030,000 Communards in the fighting and in massacres of men, women, and children during and after the Commune. More recent histories, based on studies of the number buried in Paris cemeteries and in mass graves after the fall of the Commune, put the number killed at between 6,000 and 10,000. Twenty-six courts were established to try more than 40,000 people who had been arrested, which took until 1875 and imposed 95 death sentences, of which 23 were inflicted. Forced labour for life was imposed on 251 people, 1,160 people were transported to "a fortified place" and 3,417 people were transported. About 20,000 Communards were held in prison hulks until released in 1872 and a great many Communards fled abroad to England, Switzerland, Belgium or the United States. The survivors were amnestied by a bill introduced by Gambetta in 1880 and allowed to return.
Try to answer this question if possible: What is the rough estimate of the number of people killed?
Answer: between 6,000 and 10,000
Question: In 2006, FIG introduced a new points system for Artistic gymnastics in which scores are no longer limited to 10 points. The system is used in the US for elite level competition. Unlike the old code of points, there are two separate scores, an execution score and a difficulty score. In the previous system, the "execution score" was the only score. It was and still is out of 10.00. During the gymnast's performance, the judges deduct this score only. A fall, on or off the event, is a 1.00 deduction, in elite level gymnastics. The introduction of the difficulty score is a significant change. The gymnast's difficulty score is based on what elements they perform and is subject to change if they do not perform or complete all the skills, or they do not connect a skill meant to be connected to another. Connection bonuses are the most common deduction from a difficulty score, as it can be difficult to connect multiple flight elements. It is very hard to connect skills if the first skill is not performed correctly. The new code of points allows the gymnasts to gain higher scores based on the difficulty of the skills they perform as well as their execution. There is no maximum score for difficulty, as it can keep increasing as the difficulty of the skills increase.
Try to answer this question if possible: When were scores first limited to 10 points?
Answer: unanswerable
Question: Some of Antarctica has been warming up; particularly strong warming has been noted on the Antarctic Peninsula. A study by Eric Steig published in 2009 noted for the first time that the continent-wide average surface temperature trend of Antarctica is slightly positive at >0.05 C (0.09 F) per decade from 1957 to 2006. This study also noted that West Antarctica has warmed by more than 0.1 C (0.2 F) per decade in the last 50 years, and this warming is strongest in winter and spring. This is partly offset by autumn cooling in East Antarctica. There is evidence from one study that Antarctica is warming as a result of human carbon dioxide emissions, but this remains ambiguous. The amount of surface warming in West Antarctica, while large, has not led to appreciable melting at the surface, and is not directly affecting the West Antarctic Ice Sheet's contribution to sea level. Instead the recent increases in glacier outflow are believed to be due to an inflow of warm water from the deep ocean, just off the continental shelf. The net contribution to sea level from the Antarctic Peninsula is more likely to be a direct result of the much greater atmospheric warming there.
Try to answer this question if possible: What did the study note about the temperatures in East Antarctica?
Answer:
unanswerable