¿Cuál es la importancia de la colonización de habitad para la ecología?

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How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

The influenza virus cause the flu, but not other diseases. why?

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2