Narrow passages between larger bodies of water is called

Needed fast 15 points the process of natural selection favors certain characteristics in organisms, while it selects against other characteristics. what would happen if there was zero variation between all of the organisms on earth? a.organisms would evolve to increase variety b.natural selection would operate faster c.less food would be available d.evolution through natural selection would not occur

Number the steps from when a stimulus is received to when the body reacts

Distance that the transcontinental railroad covered from omaha to san francisco.