1 The highest monthly average temperature in Keystone for July is 54 degrees. 2  The lowest monthly average temperature in Keystone for December is 14 degrees. 3  The most monthly precipitation in Keystone occurs in January with 0 inches.  The air quality index in Keystone is 15% better than the national average.
Simple eye in invertebrates. A simple eye (sometimes called a pigment pit) refers to a type of eye form or optical arrangement that contains a single lens. A simple eye is so called in distinction from a multi-lensed compound eye, and is not necessarily at all simple in the usual sense of the word. The eyes of humans and large animals, and camera lenses are classed as simple because in both cases a single lens collects and focuses light onto the retina or film.
A honey bee stings to protect itself or the hive from a perceived threat. The hive contains the queen bee, the young bees and the stores of honey. Bees are programmed to protect their hive at all costs. A worker honey bee typically only stings if threatened, or if you are near its hive. An exception to this rule is the Africanized worker bee, which is known to be more aggressive. Africanized bees may sting with less provocation than it would take for a regular honey bee to sting.