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Q. No.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 pepper 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: Â Modification of Roots |Â Modifications of Stem |
Level 3: 35%-60%
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Subtopic: Â Modifications of Stem |
 85%
Level 1: 80%+
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How many of the given statements are true?
1. 0
2. 1
3. 2
4. 3
| I: | Stem tendrils are seen in gourds and grapevines. |
| II: | Axillary buds get modified into thorns in Citrus. |
| III: | Stems are modified into flattened structures in Opuntia. |
2. 1
3. 2
4. 3
Subtopic: Â Modifications of Stem |
 81%
Level 1: 80%+
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Stem is modified into a fleshy cylindrical structure in:
| 1. | Euphorbia | 2. | Pistia |
| 3. | Citrus | 4. | Bougainvillea |
Subtopic: Â Modifications of Stem |
 90%
Level 1: 80%+
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The lateral branches originate from the basal and underground portion of the main stem, grow horizontally beneath the soil, and then come out obliquely upward giving rise to leafy shoots in
1. Pistia and Eichhornia
2. Pineapple and Chrysanthemum
3. Mint and Jasmine
4. Opuntia and Euphorbia
1. Pistia and Eichhornia
2. Pineapple and Chrysanthemum
3. Mint and Jasmine
4. Opuntia and Euphorbia
Subtopic: Â Modifications of Stem |
 60%
Level 2: 60%+
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Runner, a stem modification for vegetative propagation, is found in all of the following except:
1. Cyanodon dactylon
2. Oxalis
3. Pistia
4. Marsilea
1. Cyanodon dactylon
2. Oxalis
3. Pistia
4. Marsilea
Subtopic: Â Modifications of Stem |
 68%
Level 2: 60%+
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A lateral branch with short internodes and each node bearing a rosette of leaves and a tuft of roots is found in:
1. Chrysanthemum
2. Pistia
3. Jasmine
4. Pineapple
1. Chrysanthemum
2. Pistia
3. Jasmine
4. Pineapple
Subtopic: Â Modifications of Stem |
 79%
Level 2: 60%+
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Q. No.
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