Earths magnetic field helps protect Earth and its organisms. It protects us from harmful particles given off by the sun. Most of the particles are attracted to the north and south magnetic poles. This is where Earths magnetic field is strongest. This is also where relatively few organisms live. Another benefit of Earths magnetic field is its use for navigation. People use compasses to detect Earths magnetic north pole. Knowing this helps them tell direction. Many animals have natural 'compasses' that work just as well. Birds like the garden warbler in Figure 1.36 use Earths magnetic field. They use it to guide their annual migrations. Recent research suggests that warblers and other migrating birds have structures in their eyes. These structures let them see Earths magnetic field as a visual pattern.
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QUESTION: Is Earths magnetic field strongest in the East and West, or the North and South?

Federal health authorities Monday added 58 types of cancer to the list of covered illnesses for people who were exposed to toxins at the site of the World Trade Center in the aftermath of the September 11 attacks. The addition finalizes a recommendation from Dr. John Howard, administrator of the World Trade Center Health Program. Howard proposed in June that the program accept the recommendations of its Science/Technical Advisory Committee and add some cancers to the coverage list -- 14 categories in all. Firefighters responding to 9/11 at increased cancer risk The advisory committee review called for expanded "coverage for certain types of cancer resulting from exposure to toxins released at Ground Zero." "The publication of this final rule marks an important step in the effort to provide needed treatment and care to 9/11 responders and survivors through the WTC Health Program," Howard said in a statement Monday. The rule is expected to be published Wednesday in the Federal Register, and will take effect 30 days after its publication, Howard said. 9/11 detective dies after battle with lung cancer First responders, volunteers, survivors of the attacks and residents near the site who meet specific qualifications will be eligible for coverage, according to the World Trade Center Health Program. According to the proposed rule, an estimated 950 to 2,150 people would take advantage of the additional coverage. The estimated cost for the total cancer treatment ranges between $14.5 million and $33 million, the proposal said.
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QUESTION: How many categories of cancer did the World Trade Center Health Program add to the Federal Register?

Relying on an animal to come by is risky. A flower may have to wait a long time for the right animals to come by. What if one never passes close enough to the flower? Hoping the wind will blow is also risky for a plant. What if the wind does not blow? What if the blowing pollen does not land on another flower? The wind could even blow the pollen over the ocean where it is wasted. Giving free nectar is costly. It is not a good use of the plants energy. A plant uses a lot of energy to produce nectar. Some animals may just drink the nectar. They may not carry off any pollen in return. To improve their chances, plants evolved special traits. For example, they developed ways to hide their nectar. Only certain animals were able to get at the plants hidden nectar. These specific animals might be more likely to visit only flowers of the same species. This was also a benefit for some animals. Animals also evolved special traits to get to the nectar.
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QUESTION: Why is it risky for a flower to wait on an animal to come by?

Madame White Snake: East Asian Femme Fatale of Old The Chinese legend of Madame White Snake, the snake demon that takes human form and becomes the wife of a man, has exerted a lasting influence over East Asian folktales and fiction for centuries. Two quintessential novellas, "The Lust of the White Serpant" from Ugetsu Monogatari by the Japanese author Ueda Akinari and "Eternal Prisoner under Thunder Peak Pagoda" a traditional Chinese story, are both relatively complex and demonstrate not only the evolution of the White Snake figure to become a more believable human, but also what aspects may have given her enduring appeal. While both these stories are ostensibly morality tales about the dangerous beauty of this femme fatale, the true source of pleasure from these narratives is the femme fatale's transgressive behavior, not her eventual punishment for it. Early tales of Madame White Snake appeared in China as early as the Song Dynasty, and initially her portrayal was fairly direct, as a villainous demon who drains the life force out of her human husband. But over time, characterizations of her became more complex, and the persona of Madame White Snake became more sympathetic, and perhaps even a model of the ideal Confucian wife, particularly in "Pagoda". Whalen Lai notes, "She was a loving wife, a caring mother, rescuer of her family from the first flood, and, at that point, a general benefactor of man. She took on the virtues of a traditional Chinese female, particularly forbearance". But if she were really an ideal wife, why could she not live happily with her human mate? Her dangerous sexuality is the key. Femme fatale might seem an unusual term to apply to a character from pre-modern Chinese and Japanese literature who may exemplify the virtues of an ideal Confucian wife, since it is primarily associated with film characters, particularly those of the film noir genre. But this term, which is relatively speaking, a neologism (The earliest uses were around the beginning of the 20th century
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QUESTION:
Could Madame White Snake live out a normal life with her mate, why or why not?