What effect has imperialism in Africa had on the borders of African nations today?

The effect imperialism has in Africa on the borders of African nations today is that they are based on the arbitrary borders of old European empires.

I believe the answer is: They are based on the arbitrary borders of old European empires

African continent was colonized by different european empire. To avoid conflicts among the european, they divided africa into several territories and dtermine which country has the jurisdiction over each territories. After African nations gained independence, they still use this separation as borders to differentiate one country with another.