Natural selection cannot?
a. cause a change in a population
b. populations adapt '
c. select what a species needs
d. eliminate negative traits in a population over time

Why did einstein write a letter to president roosevelt

Why did metternich think nationalism threatened the austrian empire?

In a modern democracy all elected officials serve for a certain number of terms then must retire a high school sophomore and a senior citizen may vote at the polls together a united states senator votes on immigration law on behalf of your mother through indirect ballot all democracies have a two chamber system of representation united states citizens live in a direct democracy