Q. No.In the transverse section of a monocot root given below, identify A, B, C and D:
| A | B | C | D | |
| 1. | Epidermis | Exodermis | Endodermis | Pericycle |
| 2. | Exodermis | Epidermis | Endodermis | Pericycle |
| 3. | Epidermis | Exodermis | Pericyle | Endodermis |
| 4. | Exodermis | Epidermis | Pericyle | Endodermis |
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In a dicot root, initiation of lateral roots and vascular cambium during the secondary growth takes place in the cells of:
| 1. | Outer cortex | 2. | Inner cortex |
| 3. | Endodermis | 4. | Pericycle |
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In a dicot root, the number of patches of xylem and phloem are usually:
| 1. | 2 to 4 | 2. | 4 to 6 |
| 3. | 6 to 8 | 4. | 8 to 10 |
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All the following statements regarding the anatomy of a typical dicotyledonous root are correct except:
1. Many cells of the epiblema protrude in the form of unicellular root hairs.
2. The innermost layer of the cortex is called as the endodermis.
3. Pericycle is made up of collenchymatous cells.
4. Parenchymatous conjunctive tissue lies between the xylem and phloem.
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The term ‘stele’in a dicot root does not include:
| 1. | Endodermis | 2. | Pericycle |
| 3. | Vascular bundles | 4. | Pith |
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Monocot root anatomy is different from the anatomy of dicot root in all the following aspects except:
1. More developed pith
2. Polyarch vascular bundles
3. Absence of secondary growth
4. Presence of multicellular root hairs
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The following diagram shows the anatomy of the root of an epiphytic orchid. The function of the structure marked X is:
1. Photosynthesis
2. Storage
3. Protective
4. Repair and healing
| 1. | Monocot stem | 2. | Dicot stem |
| 3. | Monocot root | 4. | Dicot root |
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Identify the option where the difference between the anantomy of Dicot and Monocot root is not correctly mentioned:
|
Dicot root |
Monocot root |
||
|
1. |
Xylem bundles |
Numerous |
Vary between 2 and 6 |
|
2. |
Pith |
Small/absent |
Large/well developed |
|
3. |
Pericycle |
Gives rise to lateral roots, cambium and cork cambium |
Gives rise to lateral roots only |
|
4. |
Cambium |
Appears later as a secondary meristem |
Altogether absent |
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