Problem: Please answer a question about the following article about Flowering plant:
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.
Why did flowering plants develop numerous morphological and physiological mechanisms?
A: reduce or prevent self-fertilization
Problem: Please answer a question about the following article about Charleston, South Carolina:
In 1832, South Carolina passed an ordinance of nullification, a procedure by which a state could, in effect, repeal a federal law; it was directed against the most recent tariff acts. Soon, federal soldiers were dispensed to Charleston's forts, and five United States Coast Guard cutters were detached to Charleston Harbor "to take possession of any vessel arriving from a foreign port, and defend her against any attempt to dispossess the Customs Officers of her custody until all the requirements of law have been complied with." This federal action became known as the Charleston incident. The state's politicians worked on a compromise law in Washington to gradually reduce the tariffs.
The federal action of sending soldiers to Charleston in 1832 is known as what?
A: the Charleston incident
Problem: Please answer a question about the following article about Kanye West:
The College Dropout was eventually issued by Roc-A-Fella in February 2004, shooting to number two on the Billboard 200 as his debut single, "Through the Wire" peaked at number fifteen on the Billboard Hot 100 chart for five weeks. "Slow Jamz", his second single featuring Twista and Jamie Foxx, became an even bigger success: it became the three musicians' first number one hit. The College Dropout received near-universal critical acclaim from contemporary music critics, was voted the top album of the year by two major music publications, and has consistently been ranked among the great hip-hop works and debut albums by artists. "Jesus Walks", the album's fourth single, perhaps exposed West to a wider audience; the song's subject matter concerns faith and Christianity. The song nevertheless reached the top 20 of the Billboard pop charts, despite industry executives' predictions that a song containing such blatant declarations of faith would never make it to radio. The College Dropout would eventually be certified triple platinum in the US, and garnered West 10 Grammy nominations, including Album of the Year, and Best Rap Album (which it received). During this period, West also founded GOOD Music, a record label and management company that would go on to house affiliate artists and producers, such as No I.D. and John Legend. At the time, the focal point of West's production style was the use of sped-up vocal samples from soul records. However, partly because of the acclaim of The College Dropout, such sampling had been much copied by others; with that overuse, and also because West felt he had become too dependent on the technique, he decided to find a new sound.
How many Grammy nominations did The College Dropout receive?
A: 10
Problem: Please answer a question about the following article about Military history of the United States:
After just 100 hours of ground combat, and with all of Kuwait and much of southern Iraq under coalition control, US President George H. W. Bush ordered a cease-fire and negotiations began resulting in an agreement for cessation of hostilities. Some US politicians were disappointed by this move, believing Bush should have pressed on to Baghdad and removed Hussein from power; there is little doubt that coalition forces could have accomplished this if they had desired. Still, the political ramifications of removing Hussein would have broadened the scope of the conflict greatly, and many coalition nations refused to participate in such an action, believing it would create a power vacuum and destabilize the region.
Who ordered the cease-fire that effectively ended hostilities?
A:
US President George H. W. Bush