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).
Kindle Fire HD comes with 16GB & 32GB versions. If you download couple of HD movies & few songs etc, You might use up most of the storage on your Kindle Fire HD. You can have more available storage by deleting unwanted stuff like videos, downloads etc. You can see what is using most of storage on your Kindle Fire easily.