Why did Muhammad move from Mecca to the city medical

How did presidential reconstruction allow black codes to be passed

How did the spanish prove to be excellent allies in the war? give examples?

Which statement below accurately describes the carrying capacity of any ecosystem? a. it is not affected by any abiotic or biotic resources. b. it does not affect the species of an ecosystem. c. it is completely dependent upon the food supply. d. it is affected by both abiotic and biotic resources