Q. No.
Read the following statements about dicot stem and
choose the correct option.
(a)
Vascular bundles are arranged in a ring.
(b)
Vascular bundles are conjoint, collateral and open type.
(c)
Endarch type of arrangement of secondary xylem.
1.
Only (b) is correct
2.
Only (c) is incorrect
3.
Both (a) and (b) are incorrect
4.
All three statements are correct
choose the correct option.
What is incorrect for companion cell?
| 1. | It is specialized parenchymatous cell. |
| 2. | It helps in maintaining the pressure gradient in the sieve tubes. |
| 3. | It does not retain nucleus throughout the life. |
| 4. | It is absent in gymnosperms |
Which of the following characters is/are related to isobilateral leaf?
| (a) | Stomata are present on both surfaces. |
| (b) | Mesophyll is differentiated into palisade and spongy parenchyma. |
| (c) | Sub-stomatal cavity is present below the stoma of the abaxial epidermis. |
1. Only (a)
2. Only (c)
3. Only (a) and (c)
4. (a), (b) and (c)
Select the incorrect statement with respect to vessel
| 1. | Devoid of protoplasm. |
| 2. | Lignified wall. |
| 3. | Long cylindrical tube like cells. |
| 4. | Presence of vessel is characteristic of gymnosperm. |
Which is the correct set of options with respect to the following?
1. Dicot stem – Differentiated ground tissue.
Monocot stem – Endarch xylem.
Dicot leaf – Isobilateral leaf.
Monocot leaf – Dorsiventral leaf.
2. Dicot stem – Scattered vascular bundle.
Monocot stem – Arranged vascular bundle.
Dicot leaf – Amphistomatic.
Monocot leaf – Hypostomatic.
3. Dicot stem – Endodermis is called a starch sheath.
Monocot stem – Vascular bundle surrounded by a sclerenchymatous sheath.
Dicot leaf – Palisade and spongy parenchyma.
Monocot leaf – Stomata present on both surfaces.
4. Dicot stem – Arranged vascular bundle.
Monocot stem – Endodermis is called a starch sheath.
Dicot leaf – Amphistomatatic.
Monocot leaf – Palisade and spongy
parenchyma.
In the given diagram, which is not related with (A) as indicated in the diagram?
| 1. | Complimentary cells. |
| 2. | Involved in the exchange of gases. |
| 3. | Lens-shaped opening called lenticels. |
| 4. | Found in herbaceous trees. |
The diagram given below belongs to -
| 1. | Dicot stem having conjoint and collateral vascular bundles |
| 2. | Monocot stem having conjoint and collateral vascular bundles |
| 3. | Dicot root with polyarch condition |
| 4. | Monocot root with radial vascular bundles |
Hypodermis in dicot stem is composed of
1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. Both 1. and 3.
Read the following statements with respect to pericycle and choose the suitable option
| (a) | It is the outermost portion of stele, that may be paranchymatous or sclerenchymatous. |
| (b) | It is absent in monocot stems. |
| (c) | It is always single layered. |
| 1. | Only (a) is correct |
| 2. | Only (b) is incorrect |
| 3. | Only (c) is incorrect |
| 4. | Both (a) & (b) are incorrect |
What is true about cork cambium?
| 1. | It is extrastelar cambium in dicot stem. |
| 2. | In dicot stem it arises from the cells of cortex region. |
| 3. | It is also known as phellogen. |
| 4. | All the above |
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