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Predators are often another organism's prey, and likewise prey are often predators. Though blue jays prey on insects, they may in turn be prey for cats and snakes, and snakes may be the prey of hawks. One way of classifying predators is by trophic level. Organisms that feed on autotrophs, the producers of the trophic pyramid, are known as herbivores or primary consumers; those that feed on heterotrophs such as animals are known as secondary consumers. Secondary consumers are a type of carnivore, but there are also tertiary consumers eating these carnivores, quartary consumers eating them, and so forth. Because only a fraction of energy is passed on to the next level, this hierarchy of predation must end somewhere, and very seldom goes higher than five or six levels, and may go only as high as three trophic levels (for example, a lion that preys upon large herbivores such as wildebeest, which in turn eat grasses). A predator at the top of any food chain (that is, one that is preyed upon by no organism) is called an apex predator; examples include the orca, sperm whale, anaconda, Komodo dragon, tiger, lion, tiger shark, Nile crocodile, and most eagles and owlsand even omnivorous humans and grizzly bears. An apex predator in one environment may not retain this position as a top predator if introduced to another habitat, such as a dog among alligators, a skunk in the presence of the great horned owl immune to skunk spray, or a snapping turtle among jaguars; a predatory species introduced into an area where it faces no predators, such as a domestic cat or a dog in some insular environments, can become an apex predator by default.

What is an organism at the top of the food chain called?
Answer: apex predator
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Towards the end of the 1990s and into the 2000s, producers such as Daft Punk, Stardust, Cassius, St. Germain and DJ Falcon began producing a new sound out of Paris's house scene. Together, they laid the groundwork for what would be known as the French house movement. By combining the harder-edged-yet-soulful philosophy of Chicago house with the melodies of obscure funk, state-of-the-art production techniques and the sound of analog synthesizers, they began to create the standards that would shape all house music.

Daft Punk began producing a new sound out of what european city?
Answer: Paris
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Like Maradona, Ronaldo only stayed a short time before he left for Internazionale. However, new heroes emerged, such as Luis Figo, Patrick Kluivert, Luis Enrique and Rivaldo, and the team won a Copa del Rey and La Liga double in 1998. In 1999, the club celebrated its centenari, winning the Primera Division title, and Rivaldo became the fourth Barcelona player to be awarded European Footballer of the Year. Despite this domestic success, the failure to emulate Real Madrid in the Champions League led to van Gaal and Nunez resigning in 2000.

How long did Ronaldo remain with Barcelona?
Answer:
short time