When a fully developed parenchyma cell undergoes a change to regain its capacity to divide and form new tissues, a process known as dedifferentiation occurs. This is an example of how interfascicular cambium is formed in plants. Dedifferentiation is a process where mature cells revert to a meristematic state, allowing them to contribute to secondary growth by producing new vascular tissues. This contrasts with processes like:
In this context, the formation of interfascicular cambium is a classic case of dedifferentiation because it involves the conversion of mature, non-dividing parenchyma cells into a meristematic state, enabling them to contribute to the formation of new tissues in the plant.
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. |
Which of the following microbes is NOT involved in the preparation of household products?
A. \(\textit{Aspergillus niger}\)
B. \(\textit{Lactobacillus}\)
C. \(\textit{Trichoderma polysporum}\)
D. \(\textit{Saccharomyces cerevisiae}\)
E. \(\textit{Propionibacterium sharmanii}\)
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :