Q. No.In parenchyma, all cells are isodiametric and
1.
Thin-walled
2.
Thick-walled
3.
Lignified-walled
4.
Devoid of intercellular spaces
In which character an isobilateral leaf differs from the dorsiventral leaf?
| 1. | Scattered vascular bundles |
| 2. | Undifferentiated mesophylls |
| 3. | Absence of stomata with guard cells |
| 4. | Conjoint, collateral, and closed vascular bundle |
Tissue which provides mechanical strength and flexibility to young dicot stem is present in
| 1. | Pith | 2. | Endodermis |
| 3. | Hypodermis | 4. | Cortex |
The ground tissue system is constituted by all off these, except
| 1. | Medullary rays | 2. | Pericycle |
| 3. | Mesophyll | 4. | Xylem |
Conjoint, collateral, closed vascular bundles without phloem parenchyma are found in plants which have
| 1. | Differentiated ground tissue in the stem |
| 2. | Dedifferentiated pericyclic structure in the mature root |
| 3. | Sclerenchymatous hypodermis in stem |
| 4. | Developed pith in stem |
The tissue belonging to bark but not to periderm is
1. Vascular cambium
2. Secondary phloem
3. Phellem
4. Secondary cortex
Which of the following is correct with respect to lenticels?
| a. | Phellogen forms parenchymatous cells on the outer side |
| b. | It is a lens-shaped opening |
| c. | Helps in exchange of gases |
| d. | Present mostly in woody trees |
1. a & b correct
2. c & d correct
3. b, c, & d correct
4. All are correct
In a leaf, oval cells with large intercellular spaces and radially arranged columnar cells without intercellular spaces are placed respectively towards
| 1. | Adaxial and abaxial epidermis |
| 2. | Abaxial and adaxial epidermis |
| 3. | Abaxial and abaxial epidermis |
| 4. | Lower and abaxial epidermis |
Which of the following is not the component of secondary phloem?
1. Protophloem
2. Bast fibers
3. Companion cells
4. Phloem parenchyma
Monocot root differs from dicot root in
| 1. | Having differentiated ground tissue |
| 2. | Presence of centripetal xylem |
| 3. | Pericyclic origin of lateral roots |
| 4. | Presence of large and well-developed pith |
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