After the Roman Empire collapsed, the Catholic Church began to unify Europe by

Why is it economically necessary for the east germans to build berlin wall

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

All living things share certain characteristics. which of the following characteristics is not shared by all living things?