Context and question: Plant circadian rhythms tell the plant what season it is and when to flower for the best chance of attracting pollinators. Behaviors showing rhythms include leaf movement, growth, germination, stomatal/gas exchange, enzyme activity, photosynthetic activity, and fragrance emission, among others. Circadian rhythms occur as a plant entrains to synchronize with the light cycle of its surrounding environment. These rhythms are endogenously generated and self-sustaining and are relatively constant over a range of ambient temperatures. Important features include two interacting transcription-translation feedback loops: proteins containing PAS domains, which facilitate protein-protein interactions; and several photoreceptors that fine-tune the clock to different light conditions. Anticipation of changes in the environment allows appropriate changes in a plant's physiological state, conferring an adaptive advantage. A better understanding of plant circadian rhythms has applications in agriculture, such as helping farmers stagger crop harvests to extend crop availability and securing against massive losses due to weather.
With what feature of environment do plants need to be in sync?
Answer: light cycle
Context and question: Ricci v. DeStefano was heard by the United States Supreme Court in 2009. The case concerns White and Hispanic firefighters in New Haven, Connecticut, who upon passing their test for promotions to management were denied the promotions, allegedly because of a discriminatory or at least questionable test. The test gave 17 whites and two Hispanics the possibility of immediate promotion. Although 23% of those taking the test were African American, none scored high enough to qualify. Because of the possibility the tests were biased in violation of Title VII of the Civil Rights Act, no candidates were promoted pending outcome of the controversy. In a split 5-4 vote, the Supreme Court ruled that New Haven had engaged in impermissible racial discrimination against the White and Hispanic majority.
What percentage of those people taking the test were Asian American?
Answer: unanswerable
Context and question: Consistent with the missions and priorities outlined above, the Canadian Armed Forces also contribute to the conduct of Canadian defence diplomacy through a range of activities, including the deployment of Canadian Defence Attaches, participation in bilateral and multilateral military forums (e.g. the System of Cooperation Among the American Air Forces), ship and aircraft visits, military training and cooperation, and other such outreach and relationship-building efforts.
What is the Cooperation System Among the American Air Forces an example of?
Answer:
unanswerable