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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Epiblema of roots is equivalent to
1. | Pericycle | 2. | Endodermis |
3. | Epidermis | 4. | Stele |
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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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