1. Name the parts labelled A, B, C and D.
2. The root hair cell is in a turgid state. Name and explain the process that caused this state.
3. Mention one distinct difference between the parts labelled A and B.
4. Draw a diagram of the above root hair cell as it would appear when a concentrated solution of fertilizers is added near it.
Answers:
1. A – Cell wall
B – Cell membrane
C – Cytoplasm
D – Nucleus
2. Root water absorption is done by root hairs. Root hair contains a lot of cell saps compared to groundwater. This difference of the osmosis sets and the ground water outside the root spread to the root hairs. Forming a cell that contains root hairs, the water continues to pass into the interlocking cells in order to eventually enter the xylem vessels. The weakness found in the cells in the process also helps to push the water upward with the xylem vessels.
3.
| Cell wall | Cell membrane |
| Cell wall is thin, permeable and also allows the movement of water molecules and other substances independently inside and outside of the cell. | Cell membrane is thin, semi-permeable and it allows water molecules to pass through in and out of the cells except larger molecules of the dissolved salts. |
4.
