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).
Comparisons with the Android Tablets. The Surface RT out performs the displays on all of the full size 10 inch 1280x800 Android Tablets that we have tested. However, the 7 inch Amazon Kindle Fire HD and Google Nexus 7 have a larger 86 percent Color Gamut and much higher Pixels Per Inch screens.