Q. No.The length of different internodes in a culm of sugarcane is variable because of
1. Size of leaf lamina at the node below each internode
2. Intercalary meristem
3. Shoot apical meristem
4. Position of axillary buds
1. Size of leaf lamina at the node below each internode
2. Intercalary meristem
3. Shoot apical meristem
4. Position of axillary buds
Vascular tissue in flowering plants develops from
1. Dermatogen
2. Plerome
3. Periblem
4. Phellogen
The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is
| 1. differentiating | 2. maturing |
| 3. elongating | 4. widening |
In barley stem, vascular bundles are
1. closed and radial
2. open and scattered
3. closed and scattered
4. open and in a ring
Anatomically, fairly old dicotyledonous root is distinguished from the dicotyledonous stem by
1. Position of protoxylem
2. Absence of secondary xylem
3. Absence of secondary phloem
4. Presence of cortex
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Heart wood differs from sapwood in
1. Absence of vessels and parenchyma
2. Having dead and non-conducting elements
3. Being susceptible to pests and pathogens
4. Presence of rays and fibres
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Which one of the following is not a lateral meristem
1. Interfascicular cambium
2. Phellogen
3. Intercalary meristem
4. Intrafascicular cambium
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In land plants, the guard cells differ from other epidermal cells in having
1. Cytoskeleton
2. Mitochondria
3. Endoplasmic reticulum
4.Chloroplasts
The cork cambium, cork and secondary cortex are collectively called
1. Phelloderm
2. Phellogen
3. Periderm
4. Phellem
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