Q. No.Match xylem elements in Column I with their feature in Column II and choose answer from the codes given below:
COLUMN I
COLUMN II
A. Tracheids
a. Living with cellulosic cell wall
B. Vessels
b. Highly thickened walls and obliterated central lumens
C. Xylem fibers
c. Long cylindrical tube-like structures, lignified walls and a large central cavity
D. Xylem parenchyma
d. Elongated tube-like cells, lignified walls and tapering ends
Codes
A
B
C
D
1.
a
b
c
d
2.
b
a
d
c
3.
b
d
c
a
4.
d
c
b
a
COLUMN I
COLUMN II
A. Tracheids
a. Living with cellulosic cell wall
B. Vessels
b. Highly thickened walls and obliterated central lumens
C. Xylem fibers
c. Long cylindrical tube-like structures, lignified walls and a large central cavity
D. Xylem parenchyma
d. Elongated tube-like cells, lignified walls and tapering ends
During the formation of primary plant body, dermal tissue, ground tissue and vascular tissue are produced by:
1. Primary meristems
2. Secondary meristems
3. Both primary and secondary meristems
4. Neither primary nor secondary meristems
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Regarding the guard cells:
| 1. | walls away from the stomatal pores are thin and those towards the stomatal pores are thick |
| 2. | walls away from the stomatal pores are thick and those towards the stomatal pores are thin |
| 3. | chloroplasts are mostly absent |
| 4. | play no role in the regulation of opening and closing of stomata |
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A simple plant tissue is characterized by:
1. continued cell division
2. presence of only living cells
3. cells with chloroplasts
4. presence of only one type of cells
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All the following statements regarding the anatomy of a typical dicotyledonous root are correct except:
| 1. | Many cells of the epiblema protrude in the form of unicellular root hairs. |
| 2. | The innermost layer of the cortex is called as the endodermis. |
| 3. | Pericycle is made up of collenchymatous cells. |
| 4. | Parenchymatous conjunctive tissue lies between the xylem and phloem. |
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All the following regarding parenchyma tissue in plants are correct except:
1. Cells are generally isodiametric
2. Cell walls are generally thick
3. Cell walls are made of cellulose
4. They perform photosynthesis, storage and secretion
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The type of vascular bundles shown in the given figure would most likely be seen in:
| 1. | Dicotyledonous stem | 2. | Roots |
| 3. | Monocotyledonous stem | 4. | Leaves |
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All the following regarding collenchyma tissue in plants are correct except:
| 1. | It occurs below the epidermis of stem and leaves in most monocots |
| 2. | It is found either as a homogenous layer or in patches |
| 3. | Cells are much thickened at the corners |
| 4. | Intercellular spaces are absent |
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All the following regarding sclerenchyma tissue in plants are correct except:
1. Cells have thick lignified walls
2. Cells are usually dead and without protoplasts
3. It provides mechanical support to plant organs
4. It can assimilate food when it contains chloroplasts
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The vascular bundles in a dicot stem are:
1. conjoint, open with endarch protoxylem
2. conjoint, closed with endarch protoxylem
3. conjoint, open with exarch protoxylem
4. conjoint, closed with exarch protoxylem
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