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How many weeks' holiday a year are there? buy eriacta uk This combined model for genes and anatomy represents “quite a stride forward,” Wills says. The results not only show that the evolutionary clock ticked much faster around the time of the Cambrian, but also hint at what may have sped it up. The fact that genes and anatomy evolved at roughly the same rate suggest that pressures to adapt and survive in a world of new, complex predators drove both, the authors speculate. Innovations such as exoskeletons, vision, and jaws created new niches and evolution sped up to fill them. Wills agrees that the new research makes this explanation for the Cambrian explosion “look a lot more probable now.”

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