Why did local phone companies have a natural monopoly before the arrival of cellular technology?

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

Name the three types of population distribution

What does the plate tectonic theroy describe?