Step 1: Dedifferentiation is the process by which mature, differentiated cells lose their specialized features and revert to a meristematic or less specialized state. In this case, parenchyma cells, which are mature and differentiated, undergo dedifferentiation to form cambium cells.
Step 2: Redifferentiation refers to the process where dedifferentiated cells take on a new, specialized function. This does not apply to the formation of interfascicular cambium.
Thus, the correct answer is (3) Dedifferentiation.
List I | List II | ||
---|---|---|---|
A | Nucleolus | I | Site of formation of glycolipid |
B | Centriole | II | Organization like the cartwheel |
C | Leucoplasts | III | Site for active ribosomal RNA synthesis |
D | Golgi apparatus | IV | For storing nutrients |
Column-I | Column-II | ||
1. | Hypertonic | p. | Two molecules move in the same direction across the membrane. |
2. | Capillarity | q. | External solution is more concretrated than cell sap. |
3. | Symport | r. | Water loss in the form of droplets. |
4. | Guttation | s. | Ability of water to rise in thin tubes. |
The following diagram shown restriction sites in E. coli cloning vector pBR322. Find the role of ‘X’ and ‘Y’gens :