Q. No.What is true regarding bulliform cells seen in grasses?
1. they are certain adaxial epidermal cells that when flaccid make the leaves curl inwards
2. they are certain abaxial epidermal cells that when flaccid make the leaves curl inwards
3. they are certain adaxial epidermal cells that when turgid make the leaves curl inwards
4. they are certain abaxial epidermal cells that when turgid make the leaves curl inwards
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| 1. | wide variations in size of vascular bundles in the main veins |
| 2. | wide variations in size of vascular bundles except in the main veins |
| 3. | near similar size of vascular bundles in the main veins |
| 4. | near similar size of vascular bundles except in the main veins |
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1. occurs in all angiosperms
2. is accomplished by the procambium
3. is accomplished, at least in part, by the vascular cambium
4. brings about an increase in the height of the plant
| 1. pericycle | 2. medullary rays |
| 3. endodermis | 4. hypodermis |
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| 1. | cells that mature into secondary xylem towards pith and into secondary phloem towards periphery |
| 2. | cells that mature into secondary xylem towards periphery and into secondary phloem towards pith |
| 3. | cells that mature into primary xylem towards pith and into primary phloem towards periphery |
| 4. | cells that mature into primary xylem towards periphery and into primary phloem towards pith |
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| I. | In secondary growth in dicot stems, the amount of secondary phloem produced is more than secondary xylem |
| II. | The cambium is generally more active on the outer side than the inner |
| 1. | Both I and II are true and II explains I |
| 2. | Both I and II are true but II does not explain I |
| 3. | I is true but II is false |
| 4. | Both I and II are false |
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1. adjacent to the pith
2. just inside the vascular cambium
3. just outside the vascular cambium
4. immediately adjacent to the primary phloem
1. Interfascicular cambium
2. Secondary medullary rays
3. Cork cambium
4. Intrafascicular cambium
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Match each item in Column I with one in Column II and select the correct answer from the codes given:
| A. Spring [early] wood | a. Xylary elements with wider cavities |
| B. Autumn [late] wood | b. Xylary elements with narrow vessels |
| C. Heartwood | c. Central or innermost layers of secondary xylem |
| D. Sapwood | d. Peripheral region of the secondary xylem |
| A | B | C | D | |
| 1. | a | b | c | d |
| 2. | a | b | d | c |
| 3. | b | a | c | d |
| 4. | b | a | d | c |
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1. Tropical deciduous forest
2. Temperate deciduous forest
3. Tropical evergreen forest
4. Temperate evergreen forest
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