MULTIPLE CHOICE QUESTION During the forty-niner gold rush, the
population of Cailifornia goes from
to
1500:1,000,000
15,000:100,000
1500:10,000

Two grizzly bears are fighting over a fish to feed themselves. what kind of interaction is this scenario, which works as a limiting factor in the bears' survival? a. apparent competitionb. interference competitionc. exploitation competitiond. mutualism

When analyzing the election of 1876, what conclusion can be drawn? a.a majority of northerners wanted to enforce reconstruction policies more stringently.b.if tilden had won the electoral votes from louisiana, florida, or south carolina, he would have been elected president.c.the republican party had increased its support in the south.d.rutherford hayes did poorly in the western states.e.the republican party did a good job protecting the voting rights of african-americans in mississippi.

As our current atmosphere formed, the concentrations of various atmospheric gases fluctuated. match each gas with the explanation that best describes how its proportion changed during the evolution of the atmosphere.