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Q. No.Consider the given statements:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | In majority of the dicotyledonous plants, the direct elongation of the radicle leads to the formation of primary root which grows inside the soil. |
| II: | It bears lateral roots of several orders that are referred to as secondary, tertiary, etc., roots. |
| III: | The primary roots and its branches constitute the tap root system, as seen in the mustard plant. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Morphology of Roots |
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Although a root system performs many functions, a fibrous root system may especially be excellent for:
1. storage of food
2. absorbing water from the deeper layers of soil
3. nitrogen fixation
4. providing good anchorage to the plant
1. storage of food
2. absorbing water from the deeper layers of soil
3. nitrogen fixation
4. providing good anchorage to the plant
Subtopic: Morphology of Roots |
52%
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How many of the given statements are true?
1. 0
2. 1
3. 2
4. 3
| I: | The primary roots and its branches constitute the tap root system, as seen in the mustard plant. |
| II: | Fibrous root system is seen in the wheat plant. |
| III: | Adventitious roots are seen in Monstera and the banyan tree |
2. 1
3. 2
4. 3
Subtopic: Morphology of Roots |
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Which statement accurately describes tap roots and fibrous roots?
| 1. | Tap roots are the main roots from which other roots sprout laterally, while fibrous roots have no main root but many branching roots. |
| 2. | Fibrous roots grow deep into the soil, while tap roots spread out near the soil surface. |
| 3. | Tap roots are found in monocots, while fibrous roots are found in dicots. |
| 4. | Fibrous roots store food, whereas tap roots do not store food. |
Subtopic: Morphology of Roots |
91%
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Regarding regions of roots in angiosperms
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II, and III are correct
| I: | the apex is covered by a thimble-like structure called the root cap |
| II: | cells of the region of meristematic activity divide repeatedly |
| III: | Root hairs are found in the region of elongation |
2. Only I and III are correct
3. Only II and III are correct
4. I, II, and III are correct
Subtopic: Morphology of Roots |
85%
From NCERT
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What is the correct sequence of regions at a root tip?
| 1. | Root cap, zone of elongation, zone of maturation, meristematic zone |
| 2. | Meristematic zone, zone of elongation, zone of maturation, root cap |
| 3. | Root cap, meristematic zone, zone of elongation, zone of maturation |
| 4. | Zone of maturation, zone of elongation, root cap, meristematic zone |
Subtopic: Morphology of Roots |
88%
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Identify the correct statement:
| 1. | Monocotyledonous plants generally have taproot systems with one or more primary and secondary roots. |
| 2. | The root hair zone develops in the region of elongation. |
| 3. | Roots that develop from a stem, leaf, or other plant part are called adventitious roots. |
| 4. | Apical meristem is found in the region of maturation. |
Subtopic: Morphology of Roots | Modification of Roots |
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Regarding the regions of the root tip:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I. | Root cap protects the tender apex of the root |
| II. | Region of elongation is proximal to region of meristematic activity |
| III. | Region of maturation has root hairs |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Morphology of Roots |
87%
From NCERT
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Roots are modified in some plants for storing reserve food materials. These modified roots usually are swollen and assume different forms. Which of the following such roots does not have any definite shape?
1. radish
2. beet
3. carrot
4. sweet potato
1. radish
2. beet
3. carrot
4. sweet potato
Subtopic: Modification of Roots |
80%
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Roots are modified to provide mechanical support as seen in:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II, and III are correct
| I: | prop roots of banyan |
| II: | stilt roots of maize |
| III: | betel/black where nodes and internodes bear roots that help in climbing |
2. Only I and III are correct
3. Only II and III are correct
4. I, II, and III are correct
Subtopic: Modification of Roots | Modifications of Stem |
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