Question: Parasites can at times be difficult to distinguish from grazers. Their feeding behavior is similar in many ways, however they are noted for their close association with their host species. While a grazing species such as an elephant may travel many kilometers in a single day, grazing on many plants in the process, parasites form very close associations with their hosts, usually having only one or at most a few in their lifetime. This close living arrangement may be described by the term symbiosis, "living together", but unlike mutualism the association significantly reduces the fitness of the host. Parasitic organisms range from the macroscopic mistletoe, a parasitic plant, to microscopic internal parasites such as cholera. Some species however have more loose associations with their hosts. Lepidoptera (butterfly and moth) larvae may feed parasitically on only a single plant, or they may graze on several nearby plants. It is therefore wise to treat this classification system as a continuum rather than four isolated forms.
Try to answer this question if possible: Predator and prey relationships that improve fitness for both species are classified as this type of relationship.
Answer: mutualism
Question: In May 2008, Dell reached an agreement with office supply chain, Officeworks (part of Coles Group), to stock a few modified models in the Inspiron desktop and notebook range. These models have slightly different model numbers, but almost replicate the ones available from the Dell Store. Dell continued its retail push in the Australian market with its partnership with Harris Technology (another part of Coles Group) in November of the same year. In addition, Dell expanded its retail distributions in Australia through an agreement with discount electrical retailer, The Good Guys, known for "Slashing Prices". Dell agreed to distribute a variety of makes of both desktops and notebooks, including Studio and XPS systems in late 2008. Dell and Dick Smith Electronics (owned by Woolworths Limited) reached an agreement to expand within Dick Smith's 400 stores throughout Australia and New Zealand in May 2009 (1 year since Officeworks — owned by Coles Group — reached a deal). The retailer has agreed to distribute a variety of Inspiron and Studio notebooks, with minimal Studio desktops from the Dell range. As of 2009[update], Dell continues to run and operate its various kiosks in 18 shopping centres throughout Australia. On March 31, 2010 Dell announced to Australian Kiosk employees that they were shutting down the Australian/New Zealand Dell kiosk program.
Try to answer this question if possible: In which country did Dell cut ties with Harris Technology?
Answer: unanswerable
Question: During ordinary operation, the tungsten of the filament evaporates; hotter, more-efficient filaments evaporate faster. Because of this, the lifetime of a filament lamp is a trade-off between efficiency and longevity. The trade-off is typically set to provide a lifetime of several hundred to 2,000 hours for lamps used for general illumination. Theatrical, photographic, and projection lamps may have a useful life of only a few hours, trading life expectancy for high output in a compact form. Long-life general service lamps have lower efficiency but are used where the cost of changing the lamp is high compared to the value of energy used.
Try to answer this question if possible: What is not a trade-off between efficiency and longevity?
Answer: unanswerable
Question: Partly because of low sanitation coverage about 17,000 children die each year because of diarrhoea. Another challenge is low cost recovery due to water tariffs that are among the lowest in the world. This in turn requires government subsidies even for operating costs, a situation that has been aggravated by salary increases without tariff increases after the Arab Spring. Poor operation of facilities, such as water and wastewater treatment plants, as well as limited government accountability and transparency, are also issues.
Try to answer this question if possible: Due to low waer tariffs, what is required to maintain water treatment operation?
Answer:
government subsidies