What did Darwin and Alfred Russel Wallace contribute to the Linnean society? Darwin’s Theory of Evolution defined”?

What major land feature is located at 0* and 20* e? a sahara desert b kalahara desert c congo basin d the alps

The louisianna purchase was controversil because

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.