_ 81 - ROOT-ABSORPTION. 



7. Absorption of dissolved substances by the plant. The selective diffusion of 

 different dissolved substances into the living cell illustrated by cells placed (a) in an 

 aniline dye and (6) in methylene blue. 



8. Nature of living protoplasmic membrane. Cells of beetroot, seen under the 

 microscope, (1) living and (2) killed by the addition of alcohol. 



9. Nature of living protoplasmic membrane. Cubes of beetroot, immersed in 

 water in beakers, (1) living and (2) killed by heat. 



