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 Kindle Fire is a tablet version of Amazon.com 's Kindle e-book reader. Built with Quanta Computer, the Kindle Fire was released in November 2011, featuring a color 7-inch multi-touch display with IPS technology and running a custom version of Google 's Android operating system called Fire OS.