Q. No.Which type of cavity is present within the vascular bundles of monocot stem
(1)air cavity
(2)water cavity
(3) Both A and B
(4) Food cavity
Primary xylem is of two types, they are-
| 1. | Protoxylem and metaxylem |
| 2. | Xylem parenchyma and xylem fibres |
| 3. | Tracheids and vessels |
| 4. | Simple xylem and complex xylem |
In roots, the Protoxylem lies toward __________ and Metaxylem lies toward the _______ respectively.
1. Periphery, centre
2. Centre, periphery
3. Above, below
4. Below, above
Phloem in angiosperm is composed of
| a. | Sieve tube element |
| b. | Companion cell |
| c. | Phloem parenchyma |
| d. | Phloem fibres |
| e. | Tracheids |
| f. | Vessels |
1. a,b,c,d
2. b,c,d,e
3. c,d,e,f
4. None
Phloem of gymnosperm consist of
| 1. | Albuminous cells and Sieve cells |
| 2. | Sieve tubes and companion cells |
| 3. | Phloem parenchyma and phloem fibres |
| 4. | None of the above |
Function of sieve tubes are controlled by
| 1. | Nucleus of sieve tube |
| 2. | Nucleus of companion cell |
| 3. | Nucleus of parenchyma |
| 4. | No function as they are dead cells |
The companion cells help in maintaining the ________ in the sieve tube.
1. Temperature gradient
2. Cellulose gradient
3. Pressure gradient
4. Ion gradient
Resin, latex and mucilage are found in
| 1. | Phloem parenchyma | 2. | Xylem parenchyma |
| 3. | Phloem pits | 4. | None of the above |
Phloem parenchyma is absent in most of the
1. Dicotyledons
2. Monocotyledon
3. Desert plants
4. None of the above
Phloem fibres are made up of
| 1. | Parenchymatous cells |
| 2. | Sclerenchymatous cells |
| 3. | Collenchymatous cells |
| 4. | None of the above |
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