Natural selection will only cause evolution if there is enough genetic variation in a population. Before the discovery of Mendelian genetics, one common hypothesis was blending inheritance. But with blending inheritance, genetic variance would be rapidly lost, making evolution by natural selection implausible.
Amazon Kindle Fire (2012) The Kindle Fire has a multitouch-capable 7-inch IPS display, a dual-core processor, and at 14.6 ounces, a pretty lightweight frame. The resolution on that screen is 1024 x 600. The battery is rated to last for eight hours of continuous reading or 7.5 hours of video playback (with WiFi switched off).
The crowning glory is undoubtedly the display, however. The Kindle Fire HDX 8.9 has one of the highest resolution panels weâve seen on a tablet, running at a whopping 2560 x 1600 for a total pixel density of 339ppi: in contrast, the iPad Air tops out at 264ppi.