Statement I: | The root apical meristem and the shoot apical meristem are responsible for the primary growth of the plants and principally contribute to the elongation of the plants along their axis. |
Statement II: | In dicots and gymnosperms, the lateral meristems, vascular cambium and cork-cambium appear later in life and cause the increase in the girth of the organs in which they are active. |
Formation of interfascicular cambium and cork cambium is possible most importantly because of:
1. Differentiation | 2. Dedifferentiation |
3. Redifferentiation | 4. Reverse differentiation |
To differentiate into a tracheary element, a plant cell:
I: would lose its protoplasm
II: develops a strong, elastic lignocellulosic secondary wall
1. Only I is correct | 2. Only II is correct |
3. Both I and II are correct | 4. Both I and II are incorrect |
In plants, the living differentiated cells, have lost the capacity of division under certain conditions. This phenomenon is termed as:
1. | Dedifferentiation | 2. | Proto-differentiation |
3. | Redifferentiation | 4. | Secondary differentiation |
Consider the given two statements:
I: | Differentiation in plants is open. |
II: | Cells/tissues arising out of the same meristem have different structures at maturity. |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
To differentiate into a tracheary element, a cell would:
1. Gain protoplasm
2. Become multinucleate
3. Assimilate lot of collagen and elastin
4. Develop lignocellulosic secondary cell wall
Development is a term that includes all changes that a plant goes through during its life cycle:
1. till germination of the seed
2. during its vegetative growth
3. from germination till flowering
4. from germination to senescence