Statement I: | In geometric growth, following mitotic cell division, only one daughter cell continues to divide while the other differentiates and matures. |
Statement II: | In arithmetic growth, both the progeny cells following mitotic cell division retain the ability to divide and continue to do so. |
1. | Lt = L0 + rt | 2. | Lt = L0 X rt |
3. | Lt = L0 / rt | 4. | Lt = L0 - rt |
Assertion (A): | A sigmoid curve is a characteristic of living organism growing in a natural environment. |
Reason (R): | It is typical for all cells, tissues and organs of a plant. |
1. | Both (A) and (R) are True and (R) correctly explains (A). |
2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
3. | (A) is True; (R) is False. |
4. | (A) is False; (R) is True. |
I: | measurement and the comparison of total growth per unit time is called the absolute growth rate. |
II: | the growth of the given system per unit time expressed on a common basis, e.g., per unit initial parameter is called the relative growth rate. |
I: | Turgidity of cells helps in extension growth. |
II: | Water provides the medium for enzymatic activities needed for growth. |
III: | Oxygen helps in releasing metabolic energy essential for growth activities. |
IV: | Nutrients (macro and micro essential elements) are required for the synthesis of protoplasm and act as source of energy. |
I: | it would gain a lot of protoplasm. |
II: | it develops a very strong, elastic, lignocellulosic secondary cell walls. |
I: | Formation of a tumour. |
II: | Parenchyma cells made to divide under controlled laboratory conditions during plant tissue culture. |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
Statement I: | In cotton, coriander, and larkspur, differences in the shapes of leaves produced in air and those produced in water represent heterophyllous development due to environment. |
Statement II: | In buttercup, the leaves of the juvenile plant are different in shape from those in mature plants. |