MCQ
Cells taking part in conduction of sap are:
- ASieve tubes
- BTracheae
- CStone cells
- DCompanion cells
Explanation:
The xylem parenchyma among the dead tracheids and tracheary elements provides access for the lateral movement of water from vertical xylem elements towards cortical cells.
Xylem elements in the upper parts of pants is coated with a thin layer of cell sap.
So the trachea and tracheids with their large lumen and end to end association act as excellent pipelines for the movement of water, minerals and some organic compounds as well.
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| (a) Tight junctions | (i) Cement neighbouring cells together to form sheet |
| (b) Adhering Junctions | (ii) Transmit information through chemical to another cells |
| (c) Gap junctions | (iii) Establish a barrier to prevent leakage of fluid across epithelial cells |
| (d) Synaptic junctions | (iv) Cytoplasmic channels to facilitate communication between adjacent cells |
Select correct option from the following