Q. No.Regarding the epidermal tissue system of angiosperms:
I. Cuticle is absent in roots
II. Guard cells are dumb-bell shaped in grasses and possess chloroplasts
III. Root hairs are multicellular and the stem hairs are unicellular
1. Only I is correct
2. Only I and II are correct
3. Only II is correct
4. Only II and III are correct
II. Guard cells are dumb-bell shaped in grasses and possess chloroplasts
III. Root hairs are multicellular and the stem hairs are unicellular
2. Only I and II are correct
3. Only II is correct
4. Only II and III are correct
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While looking at a T.S. of a certain plant part you are convinced that it must be a monocot stem. Which of the following, if seen in the T.S. will give you confidence for your conclusion?
1. Conjoint vascular bundles
2. Presence of a hypodermis
3. Presence of phloem parenchyma
4. Presence of water containing cavities within the vascular bundles
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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. | Monocot stem | 2. | Dicot stem |
| 3. | Monocot root | 4. | Dicot root |
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| 1. | Radial and closed | 2. | Conjoint and open |
| 3. | Conjoint and closed | 4. | Radial and open |
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| 1. | Monocot stem | 2. | Dicot stem |
| 3. | Monocot root | 4. | Dicot root |
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Match the plants in Column I with the description of anatomy of vascular bundles in them in Column II and select the correct option from the codes given:
|
Column I |
Column II |
|
A. Dicot stem |
a. Collateral, closed and scattered in ground tissue |
|
B. Monocot stem |
b. Conjoint, collateral endarch and open |
|
C. Dicot root |
c. Radial, exarch and polyarch [usually more than 6] |
|
D. Monocot root |
d. Radial, exarch and 2 to 6 in number |
Codes
| A | B | C | D | |
| 1. | a | b | c | d |
| 2. | b | a | d | c |
| 3. | a | b | d | c |
| 4. | b | a | c | d |
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In the transverse section of a young dicot stem, the term ‘hard bast’ will be used for the structure labeled:
| 1. | A | 2. | B |
| 3. | C | 4. | D |
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