Mention the three phases of growth.
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Hy,
3 phases of growth are-
1. Lag phase
2. Log phase
3. Post log phase/ Stationary phase.
Hope it helps
Regards
Dr Chinmay
Thanks
3 phases of growth are-
1. Lag phase
2. Log phase
3. Post log phase/ Stationary phase.
Hope it helps
Regards
Dr Chinmay
Thanks
Answered by
2
1. phase of cell differentiation (Formative Phase):
Cell division is the basic event for the growth of multicellular plants. All cells in an organism result from the division of pre-existing cells. The type of cell division that occurs during the growth of an organism is mitosis. It is a quantitative as well as qualitative division that is generally completed in two stages: the division of the nucleus (karyokinesis), followed by the division of the cytoplasm (cytokinesis).
During mitosis, the cell passes through prophase, metaphase, anaphase and telophase, resulting in equal distribution of the genetical material and the cytoplasm in each of the two daughter cells thus formed. Further, the daughter cells are genetically similar to the parent cell. As a result of this process, cells having the same genetic constitution get multiplied.
In higher plants, cell divisions continuously occur in the meristematic regions, such as apical meristem. As a result, an increase in the number of cells takes place in the meristematic region. Some of the daughter cells retain the meristematic activity, while others enter the next phase of growth— the phase of cell enlargement.
2. Phase of Cell Enlargement:
The cell enlargement plays an important role in contributing to the size of the tissue and organs. The enlargement occurs by synthesizing protoplasm, absorbing water (hydration), developing vacuoles and adding new cell wall material to the stretched, thin elastic walls to make them slightly thicker and permanent. Cell enlargement may be linear or in all directions.
3. Phase of Cell Differentiation or Cell Maturation:
During the last phase, the enlarged cells eventually acquire a specific size and form according to their location and role following biochemical, physiological and morphological changes, i.e., the cells undergo specialization or transformation. As a result, various kinds of cells get differentiated. These differentiated cells form different kinds of simple and complex tissues which perform different functions.
Cell division is the basic event for the growth of multicellular plants. All cells in an organism result from the division of pre-existing cells. The type of cell division that occurs during the growth of an organism is mitosis. It is a quantitative as well as qualitative division that is generally completed in two stages: the division of the nucleus (karyokinesis), followed by the division of the cytoplasm (cytokinesis).
During mitosis, the cell passes through prophase, metaphase, anaphase and telophase, resulting in equal distribution of the genetical material and the cytoplasm in each of the two daughter cells thus formed. Further, the daughter cells are genetically similar to the parent cell. As a result of this process, cells having the same genetic constitution get multiplied.
In higher plants, cell divisions continuously occur in the meristematic regions, such as apical meristem. As a result, an increase in the number of cells takes place in the meristematic region. Some of the daughter cells retain the meristematic activity, while others enter the next phase of growth— the phase of cell enlargement.
2. Phase of Cell Enlargement:
The cell enlargement plays an important role in contributing to the size of the tissue and organs. The enlargement occurs by synthesizing protoplasm, absorbing water (hydration), developing vacuoles and adding new cell wall material to the stretched, thin elastic walls to make them slightly thicker and permanent. Cell enlargement may be linear or in all directions.
3. Phase of Cell Differentiation or Cell Maturation:
During the last phase, the enlarged cells eventually acquire a specific size and form according to their location and role following biochemical, physiological and morphological changes, i.e., the cells undergo specialization or transformation. As a result, various kinds of cells get differentiated. These differentiated cells form different kinds of simple and complex tissues which perform different functions.
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