Number 6 is c. number 7 is a. and i'm not sure
of number 8 sorry
Answer:
They have helical thickening of lignin in their walls to prevent collapse
Explanation:
the primary function of Xylem and its conducting vessels tracheids is to provide support and tranport water and minerals in plants.
Xylem vessels have layers of dead materials in the walls called LIGNIN. Lignin is a polymer; a very strong, hard materials that stop water passage through it,because it contains dead cells,
Therefore the presence of deposit of these strong impermeable, ligified walls in its walls prevent its collapse during mass flow of water of transpiration pull.
Answer:
mitochondria, golgi, ER
Explanation:
These folds have a great advantage for mitochondria as they increase the surface area where chemical reactions occur.
1.chloroplasts
2. Centriole
3.membrane
4 clotoplasm
7 mitochondria
8 cellulose
10 ribosome
11 vacuoles
12 cytoplasm
13 chromatin
14 diffusion
15. I'm not sure sorry
