NCERT textbook says that plant growth is unique. What is the character of plant growth being referred to?
1. Plants have a closed growth
2. Capacity of unlimited growth throughout life
3. Complete absence of growth after a certain age
4. Growth without development
All the following contribute to an increase in girth of dicots and gymnosperms except:
1. Apical meristem | 2. Lateral meristems |
3. Vascular cambium | 4. Cork-cambium |
Match Column I [phase of growth] and Column II [cell characteristics] and choose the correct answer from the codes given:
COLUMN I | COLUMN II | ||
A | Meristematic | a | Increased vacuolation, new cell wall deposition |
B | Elongation | b | Thin cellulosic wall with abundant plasmodesmatal connections |
C | Maturation | c | Maximal wall thickening |
Codes
A | B | C | |
1. | a | b | c |
2. | b | c | a |
3. | b | a | c |
4. | c | b | a |
Identify the incorrect statement regarding the arithmetic growth?
1. | Following mitosis, both daughter cells continue to divide |
2. | Can be exemplified by root elongating at a constant rate |
3. | On plotting the length of the organ against time, a linear curve is obtained |
4. | Mathematically it is expressed as |
The shape of the growth curve characteristic of a living organism growing in natural environment is:
1. | Linear | 2. | Sigmoid |
3. | Hyperbola | 4. | Bell shaped |
Plant growth and further development is intimately linked to water status of the plant because:
A. Turgidity of cells helps in extension growth
B. It provides medium for enzymatic activity
1. Both A and B are correct
2. Only A is correct
3. Only B is correct
4. Both A and B are incorrect
The optimum temperature range for proper growth in most plants is:
1. | \(0^\circ C - 100^\circ C\) | 2. | \(15^\circ C - 20^\circ C\) |
3. | \(28^\circ C - 30^\circ C\) | 4. | \(45^\circ C\) | Greater than
Consider the given diagram and select the correct inference:
1. | Both leaves have shown different absolute growths |
2. | First leaf has exhibited growth but second leaf has not as it is already senescent |
3. | The relative growth of first leaf is more than that of the second leaf |
4. | Both leaves have exhibited equal relative growths |
1. Only I | 2. Only II |
3. Both I and II | 4. Neither I nor II |