Marine science FLVS module 2 DBA questions help ASAP please

Which of the follow describes a disadvantage secondary sources have compared to primary sources?

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

Some substances but not other can cross the (blank) membrane of a cell