Q. No.Roots arising from the parts of a plant other than radical are called as:
| 1. Tap root | 2. Fibrous roots |
| 3. Adventitious roots | 4. Lateral roots |
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Root hairs at the root tip are formed by:
| 1. | Epidermal cells in the region of maturation |
| 2. | Cortical cells in the region of elongation |
| 3. | Epidermal cells in the region of elongation |
| 4. | Cortical cells in the region of maturation |
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Pneumatophores are found in plants growing in:
| 1. Xeric conditions | 2. Swampy areas |
| 3. Hypersaline environments | 4. Permafrost conditions |
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What is not true for a stem in a flowering plant in general?
1. Negatively geotropic
2. Develops from plumule of the germinating embryo
3. Absence of terminal and axillary buds
4. Spreads out branches bearing leaves, flowers and fruits
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Stem tendrils are present in all the following except:
| 1. Citrus | 2. Watermelon |
| 3. Cucumber | 4. Grapevines |
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Stems contain chlorophyll and carry out photosynthesis in:
| 1. Opuntia and Euphorbia | 2. Mint and Jasmine |
| 3. Pistia and Eichhornia | 4. Banana and Pineapple |
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A lateral branch arises from the base of the main axis and after growing aerially for some time arches downwards to touch the ground in:
| 1. Opuntia and Euphorbia | 2. Mint and Jasmine |
| 3. Pistia and Eichhornia | 4. Banana and Pineapple |
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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 upwards giving rise to leafy shoots in:
| 1. Opuntia and Euphorbia | 2. Mint and Jasmine |
| 3. Pistia and Eichhornia | 4. Banana and Pineapple |
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Both stem tendrils and stem thorns:
1. help the plant to climb
2. develop from axillary buds
3. protect plants from browsing animals
4. can be used in vegetative propagation
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Underground stems of potato, ginger, turmeric, Zaminkand and Colocasia:
I. Store food in them
II. Act as organs of perennation
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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