Do the cleavage directions meet at 90-degree angles or angles other than 90 degrees

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.

Why is the indus river so important to the people of pakistan?

What do muslims believe a prophet is? a deity an angel a minister a messenger