Examen de Inglés de La Rioja (selectividad de 2002)

UNIVERSIDAD DE LA RIOJA Pruebas de Acceso a la Universidad LOGSE Curso 20012002 Convocatoria Septiembre ASIGNATURA INGLÉS THE REGIONS OF fflE OCEAN Life in the oceans which occupy so much of the Earths surface is divided into several distinct zones each with its own group of creatures that feed upon each other and also depend on each other in different ways There is first of ali what is known as the tidal zone where land and sea meet Then comes a zone of shallow seas around continents which goes down to about 500 feet This zone is called the continental shelf It is in these two zones that th…
Comunidad Autónoma La Rioja
Asignatura Inglés
Convocatoria Extraordinaria de 2002
Fase General
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Ecological pyramid

Ecological pyramid

An ecological pyramid (also trophic pyramid, eltonian pyramid, energy pyramid, or sometimes food pyramid) is a graphical representation designed to show the biomass or bio productivity at each trophic level in a given ecosystem.

Fuente: wikipedia.org

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