Answer:The Food Chain: The answer has to do with trophic levels. As you probably know, the organisms at the base of the food chain are photosynthetic; plants on land and phytoplankton (algae) in the oceans. These organisms are called the producers, and they get their energy directly from sunlight and inorganic nutrients. The organisms that eat the producers are the primary consumers. They tend to be small in size and there are many of them. The primary consumers are herbivores (vegetarians). The organisms that eat the primary consumers are meat eaters (carnivores) and are called the secondary consumers. The secondary consumers tend to be larger and fewer in number. This continues on, all the way up to the top of the food chain. About 50% of the energy (possibly as much as 90%) in food is lost at each trophic level when an organism is eaten, so it is less efficient to be a higher order consumer than a primary consumer. Therefore, the energy transfer from one trophic level to the next, up the food chain, is like a pyramid; wider at the base and narrower at the top. Because of this inefficiency, there is only enough food for a few top level consumers, but there is lots of food for herbivores lower down on the food chain. There are fewer consumers than producers.
Land and aquatic energy pyramids
Trophic Level Desert Biome Grassland Biome Pond Biome Ocean Biome
Producer (Photosynthetic) Cactus Grass Algae Phytoplankton
Primary Consumer (Herbivore) Butterfly Grasshopper Insect Larva Zooplankton
Secondary Consumer (Carnivore) Lizard Mouse Minnow Fish
Tertiary Consumer (Carnivore) Snake Snake Frog Seal
Quaternary Consumer (Carnivore) Roadrunner Hawk Raccoon Shark
Food Web: At each trophic level, there may be many more species than indicated in the table above. Food webs can be very complex. Food availability may vary seasonally or by time of day. An organism like a mouse might play two roles, eating insects on occasion (making it a secondary consumer), but also dining directly on plants (making it a primary consumer). A food web of who eats who in the southwest American desert biome might look something like this:
Explanation:
Answer:
334.48
Explanation:
delta T = 4 degrees
m = 20 grams of water
c = 4.181 J / gram
E = 20 * 4.181 * 4
E = 334.48 Joules
Remember to change c to Joules / gram
4181 j / kg * 1 kg / 1000 grams = 4.181 j / gram
Answer:
a type of substitution where ect.
Explanation:
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Answer:
Fundamento: La industria farmacéutica a nivel internacional tiene entre sus estrategias la propaganda de medicamentos directa al consumidor, para incrementar sus ganancias.
Objetivo: Valorar cómo puede influir la promoción inadecuada en el uso racional de medicamentos y como se presenta en Cuba.
Metodología: Se realizó una búsqueda de información, en fuentes primarias y secundarias, sobre promoción y uso no adecuado de los medicamentos.
Resultados: Se encontró que la propaganda realizada de manera directa al consumidor genera un aumento de las ventas de los productos anunciados, lo cual hace de la promoción una herramienta esencial de marketing para la industria farmacéutica internacional, situación que no es uniforme, sino que varía de un país a otro con un denominador común: las anomalías mayores presentes en los países en desarrollo. La Organización Mundial de la Salud en 1988 publicó los “Criterios éticos para la promoción de medicamentos”, los cuales sirven de base para elaborar regulaciones sanitarias por parte de las autoridades nacionales de salud que permitan garantizar la calidad, seguridad y eficacia de los medicamentos.
Conclusiones. El trabajo conjunto entre autoridades sanitarias, profesionales de la salud y pacientes permitirá lograr un uso adecuado de los medicamentos sin el sesgo que conllevan los mensajes promocionales.
Palabras clave: Industria farmacéutica y ética; ética farmacéutica; control de la publicidad de productos¸ publicidad de medicamentos; tecnología farmacéutica y ética; preparaciones farmacéuticas; medicamentos sin prescripción.
DeCS: INDUSTRIA FARMACÉUTICA/ética; ÉTICA FARMACÉUTICA; CONTROL DE LA PUBLICIDAD DE PRODUCTOS; TECNOLOGÍA FARMACÉUTICA/ética; PREPARACIONES FARMACÉUTICAS.
Explanation:
