I need help with a home work question for a biology class?

I need help with a home work question for a biology class?




Please help me I need homework help:



How do molecules interact with:



1. Soil porosity:



2. Parenchyma cells:



3. Vessel elements:



4. :Casbarian band:



5. Pit membrane:



6. Stele:



7. Tracheids



Any help would be appreciated....





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