Rainforests cover about percent of the earth's surface and contain more than percent of the plant and animal species in the world. a. 50,90 b. 6, 50 c. 40, 5 d. 25, 75

Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.