Q. No.Consider the following two statements:
Statement I: ‘Tissue’ is a level of biological organization between cells and a complete organ.
Statement II: A tissue is a group of cells having a common origin and usually performing a common function.
1. Statement I is correct and Statement II is incorrect
2. Statement I is Statement II are correct
3. Statement I is Statement II are incorrect
4. Statement I is incorrect and Statement II is correct
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| I: | is constituted by some cells ‘left behind’ from shoot apical meristem during the formation of leaves and elongation of stems. |
| II: | is present in the axils of leaves and is capable of forming a branch or a flower. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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| Character | Dicot [Dorsiventral] |
Monocot [Isobilateral] |
|
| 1. | Presence of stomata | More on adaxial epidermis | More on abaxial epidermis |
| 2. | Mesophyll | Differentiated into palisade and spongy parenchyma | Not differentiated into palisade and spongy parenchyma |
| 3. | Venation | Mostly reticulate | Mostly parallel |
| 4. | Size of vascular bundle | Dependent on the size of veins | Near similar size except in main veins |
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| 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
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