Which of the following is the best example of a primary source? A. a movie
B. an encyclopedia article
C. a history textbook
D. a photograph

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

Where is the only location in the united states where you drive on the left side of the road?

Read the article about the fraser river, one of the most important rivers in canada. what is the most important species of fish in this river? why are the numbers of these fish declining?