Name 4 tools that mapmakers use to readers interpret information on maps

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

Why slip off slopes are found on the inside of meanders? why river cliffs are found on the outside of meanders?

All of the following occurred due to the invention of the railroad except