A comienzos del siglo XX, el científico norteamericano Peyton Rous descubre que un sarcoma, cáncer que se desarrolla en los tejidos que dan soporte
e interconectan el cuerpo, era causado por un virus que se transmitía de un
individuo a otro. El modelo propuesto para este caso fue rápidamente replicado
para casos humanos, es decir, se trató al cáncer como una enfermedad
infectocontagiosa. Con el paso del tiempo y el consecuente desarrollo
tecnológico, se determinó que solo un 15% de los cánceres humanos eran causados
por agentes patógenos virales. ¿Cuál fue el error de replicar para el cáncer
el modelo utilizado para el tratamiento de enfermedades infectocontagiosas?

Which table best shows the impacts resulting from human activity? impact of human activities human activity impact forest area cleared to construct an airport increase in oxygen level vegetation cleared to construct an oil mine increase in pollution impact of human activities human activity impact forest area cleared to construct an airport increase in sound pollution vegetation cleared to construct a power plant contamination of water impact of human activities human activity impact beehives cleared from urban areas increase in vegetation dams constructed on a river increase in fish population impact of human activities human activity impact beehives cleared from urban areas increase in bird population dams constructed on a river better quality of water

Asap timed! 1. ice core samples from glaciers ice caps contain bubbles of ancient atmosphere that are in layers based on age. what questions are scientists most interested in? a. how the amount of water vapor needed to make the ice has changed b. how the amount of ozone has changed over time.c. how the amount of ice in each layer has changed over time d. how the amount of carbon dioxide has changed over time 2. what produces milankovich cycles ? a. sunspots ams solar flare on the suns surface b. changes in the earths orbit c. gravitational changes bases on the position of the sun and the moond. cycles of vegetation that result in desert and rainforest conditions

If scientists are wrong about earth's age based on radioactive material and the decay rates are really much faster, how would nuclear power plants be affected?