Elabora un esquema de un organismo desde el nivel biológico más pequeño: la célula. Por ejemplo, ¿cómo está organizado un perro?, ¿una araña? Puedes elegir el organismo que tú quieras.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

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some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.