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Q. No.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
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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 |
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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 |
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The growth in plants can be best expressed as [refer Section 15.2]:
| 1. Open | 2. Determinate |
| 3. Closed | 4. Redundant |
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Plants retain the capacity for unlimited growth throughout their life. |
| Reason (R): | Plants have meristems at certain locations in their body. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Consider the given diagram regarding seed germination and identify the correct statements from the statements given:
I: ’A’ shows epigeal germination and ‘B’ shows hypogeal germination.
II: In hypogeal germination, seeds are much less vulnerable to grazing.
III: Plants showing hypogeal germination are more commonly found in nutrient-poor soils.
IV: Plants showing epigeal germination produce a large number of seeds.
1. Only I, II and III are correct
2. Only I, II and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
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