The Earth's crust is composed of roughly how many minerals? 1,000 3,000 150

All of the following statements about the biosphere are true except: a. light and heat from the sun do not affect the biosphere. b. the biosphere gets resources from earth's crust, hydrosphere and atmosphere. c. like "biology", the name for the biosphere comes from the greek word for life. d. the biosphere includes all living organisms on earth's surface.

What was apartheid and how did it restrict the rights of non-whites?

Which soil layers comprise the topsoil? o horizon a horizon b horizon c horizon