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Q. No.Which of the following statements about sclereids is correct?
1.
Sclereids are living cells with thin walls and large vacuoles
2.
Sclereids are a type of parenchyma involved in photosynthesis
3.
Sclereids are dead cells with highly thickened, lignified walls that provide mechanical support
4.
Sclereids are found only in the xylem vessels of roots
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
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Intercalary meristem is found:
1. At the tips of roots
2. At the tips of stems
3. Between mature tissues
4. In vascular bundles
1. At the tips of roots
2. At the tips of stems
3. Between mature tissues
4. In vascular bundles
Subtopic: Meristematic Tissues |
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In a dicot root:
| 1. | The innermost layer of the cortex is called hypodermis. |
| 2. | Pericycle is sclerenchymatous. |
| 3. | The pith is large and well developed. |
| 4. | There are usually two to four xylem and phloem patches. |
Subtopic: Anatomy of Root |
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In Dorsiventral (Dicotyledonous) Leaf:
| A: | The adaxial epidermis generally bears more stomata than the abaxial epidermis. |
| B: | Mesophyll has two types of cells – the palisade parenchyma and the spongy parenchyma. |
| 1. | Only A is correct |
| 2. | Only B is correct |
| 3. | Both A and B are correct |
| 4. | Both A and B are incorrect |
Subtopic: Dicot Leaf |
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The given diagram shows dumb-bell shaped guard cells. This type of guard cell is typically found in which of the following types of plants?
| 1. | Dicotyledonous plants like China rose and sunflower |
| 2. | Gymnosperms like Cycas and Pinus |
| 3. | Monocotyledonous plants like wheat and maize |
| 4. | Bryophytes like Funaria and Riccia |
Subtopic: Epidermal Tissue System |
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Which of the following correctly differentiates between the vascular bundles in stems and roots?
| 1. | Stems have radial vascular bundles; roots have conjoint ones. |
| 2. | Stems have open vascular bundles; roots have closed ones. |
| 3. | Stems have xylem and phloem arranged in a ring; roots have scattered vascular bundles. |
| 4. | Stems have conjoint vascular bundles; roots have radial vascular bundles. |
Subtopic: Vascular Tissue System |
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Where are the products of photosynthesis stored before being utilized in plants?
1. Parenchyma cells
2. Collenchyma cells
3. Sclerenchyma cells
4. Epidermal cells
1. Parenchyma cells
2. Collenchyma cells
3. Sclerenchyma cells
4. Epidermal cells
Subtopic: Simple Tissue: Parenchyma |
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Which of the following prevents water loss in leaves but is absent in roots?
1. Root hairs
2. Cuticle
3. Cork
4. Epidermis
1. Root hairs
2. Cuticle
3. Cork
4. Epidermis
Subtopic: Epidermal Tissue System |
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The cambial ring of stelar region of dicot stem is composed of:
| 1. | Cork cambium only |
| 2. | Fascicular cambium only |
| 3. | Interfascicular cambium only |
| 4. | Both fascicular and interfascicular cambium |
Subtopic: Dicot Stem |
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Which combination of features is characteristic of monocot roots?
| 1. | Polyarch xylem and small pith |
| 2. | Diarch xylem and large pith |
| 3. | Polyarch xylem and large pith |
| 4. | Tetrarch xylem and no pith |
Subtopic: Anatomy of Root |
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