(( YOU HAVE TO CHOOSE 3 ))
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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

When are the centromeres broken in meiosis?

Consider the activity and specificity of the three enzymes. pepsin is most active in the human and to digest