The Cambrian explosion refers to a rapid increase in volcanic activity. true/false?

Which statements are accurate about snow flakes

Why does sweden and norway have steep roofs

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.