Why is mexico so big? (with an explanation if possible)

Which of the following energy sources is not an example of renewable energy? a. a wind turbine farm b. a clean-burning, coal-fired electric plant c. a hydroelectric dam d. a solar panel mounted on a home

The district of columbia could be eliminated completely if a majority of congress voted in favor of the action. a. true b. false

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d