Why would someone want to make minerals when they are found in nature?

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere

What does it mean for an allele to be dominant?