Question 1
The diameter off field of view of a light microscope is 6.5mm. Plant cells lying across the diameter are 12. Determine the size of 1 cell in micrometers.
Answer
Question 2
List two structural adaptations that make xylem vessels suitable for transport of water and minerals salts.
Answer
- Hollow for continuous flow of water from roots to leaves.
- Have dead cells to allow flow of water and mineral salts without interruption.
- Walls strengthened by lignin to prevent collapsing.
- Narrow lumen to enhance capillarity.
Question 3
The equation below represents a certain biological process in cells.
C6H6 + 6O2 → 6CO2 + ATP
- Name the biological process
- Name the cell organelle where the process occurs.
Answer
- Respiration
- Mitochondrion
Question 4
Name the tissue whose cells are thickened with cellulose and pectin.
Answer
Collenchyma
Question 5
Distinguish between the lymphocytes and phagocytes.
Answer
| Lymphocytes | Phagocytes |
|---|---|
| - Lack granules in cytoplasm | - Has granules in cytoplasm |
| - Nucleus is spherical or bean shaped | - Nucleus is lobed |