Describe the structure of a cell wall of a xylem vessesl?
It is made of of a molecule known as cellulose. bundles of cellulose known as microfibrils are held together by hydrogen bonds and are arranged in layers in a cris-crosss/ mesh pattern. The layers are held together by the presence of pectins. the cell wall is also impregnated with lignin to prevent water loss and for structural strength. There are pits in the borders which allows for ease of transport between xylem cell.
NC
Related Biology A Level answers
All answers ▸How does crossing over occur during meiosis?
Using knowledge of the pathogenicity of HIV, explain why it can't be transmitted through inanimate objects or hand shakes with an infected person.
Putting bee honey on a cut kills bacteria. Honey contains a high concentration of sugar. Use your knowledge of water potential to suggest how putting honey on a cut kills bacteria. (AQA BIOL1)
How are fish are well adapted for gas exchange?