Q. No.Specialised epidermal cells surrounding the guard cells are called:
1. Lenticels
2. Complementary cells
3. Subsidiary cells
4. Bulliform cells
1. Lenticels
2. Complementary cells
3. Subsidiary cells
4. Bulliform cells
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Cortex is the region found between
1. endodermis and vascular bundle
2. epidermis and stele
3. pericycle and endodermis
4. endodermis and pith
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The balloon-shaped structures called tyloses
1. are linked to the ascent of sap through xylem vessels
2. originate in the lumen of vessels
3. characterize the sapwood
4. are extensions of xylem parenchyma cells into vessels
Identify the wrong statement in context of heartwood:
1. Organic compounds are deposited in it
2. It is highly durable
3. It conducts water and minerals efficiently
4. It comprises dead elements with highly lignified walls
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Which of the following is made up of dead cells?
1. Xylem parenchyma
2. Collenchyma
3. Phellem
4. Phloem
The vascular cambium normally gives rise to
| 1. | Phelloderm | 2. | Primary phloem |
| 3. | Secondary xylem | 4. | Periderm |
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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Secondary xylem and secondary phloem in dicot stem are produced by
1. Apical meristems
2. Axillary meristems
3. Phellogen
4. Vascular cambium
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Plants having little or no secondary growth are
| 1. | Grasses | 2. | Cycads |
| 3. | Conifers | 4. | Deciduous angiosperms |
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