About Lesson
Phases of Growth
- Cell Division:
- It is the first stage of growth. A cell becomes metabolically active at the time of cell division
- Its genetic material replicates and the cell divides mitotically into daughter cells
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- Cell Elongation:
- It is the second stage of growth, during this state the daughter cells formed as a result of mitosis enlarge
- During cell enlargement, new cell wall materials are synthesized in large quantities to cope with the enlargement of the cells
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- Cell Differentiation:
- Different tissues are formed as a result of differentiation of newly formed cells
- The form of the cells changes and some cells are differentiated into xylem tracheids and trachea and some other into sieve tubes and companion cells