How are smaller molecules like o2 and co2 able to pass through the openings of a cell membrane

The cell membrane is the outermost covering of any cell. It serves to protect, maintain and regulate the internal processes of the cell. It has a lipid bilayer which helps monitor the passage of any chemical or molecule however, nonpolar and small polar molecules are able to pass through because of simple diffusion.

Because they ran out of money,JK!

Tbh I have no idea except that maybe the tree needs some nutrition and it might be dying. Or that it combined with the grass roots and they grew into each other.

Explanation:

Hope this helps:)!