Q. No.Phloem fibers [bast fibers] are:
1.
made up of collenchyma and generally not seen in primary phloem
2.
made up of collenchyma and generally not seen in secondary phloem
3.
made up of sclerenchyma and generally not seen in primary phloem
4.
made up of sclerenchyma and generally not seen in secondary phloem
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Which of the following components of the phloem tissue in angiosperms loses protoplasm and becomes dead at maturity?
| 1. Sieve tube elements | 2. Companion cells |
| 3. Phloem parenchyma | 4. Phloem fibers |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Match each item in Column I with one in Column II and choose your answer from the codes given below:
|
Phloem components |
Feature |
|
A. Sieve tube elements |
a. Commercial use as in jute, flax and hemp |
|
B. Companion cells |
b. Plasmodesmatal connections and storage function |
|
C. Phloem parenchyma |
c. Maintaining pressure gradient in sieve tubes |
|
D. Phloem fibers |
d. Perforated end walls |
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 |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Protophloem differs from metaphloem in having:
1. companion cells present
2. dead sieve tube elements
3. narrow sieve tubes
4. lignified phloem fibers
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The incorrect statement regarding epidermal tissue system in angiosperms would be:
1. It comprises of epidermal cells and stomata but not the appendages such as trichomes
2. It is the outermost layer of the primary plant body forming a continuous layer
3. It is usually single layered
4. Cells are parenchymatous with a large vacuole
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The meristem that helps grasses regenerate parts removed by the grazing herbivores is the:
| 1. | Shoot apical meristem | 2. | Root apical meristem |
| 3. | Intercalary meristem | 4. | Lateral meristem |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
All the following are true for trichomes except:
| 1. | they are usually unicellular |
| 2. | they may be branched |
| 3. | they may be secretory |
| 4. | they help in prevention of water loss due to transpiration |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Mesophyll cells present in the ground tissue of leaves are:
1. chloroplasts lacking thin walled cells
2. chloroplasts containing thick walled cells
3. chloroplasts containing thin walled cells
4. chloroplasts lacking thick walled cells
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Open vascular bundles:
| I: | have cambium present between xylem and phloem |
| II: | possess the ability to form secondary tissues |
| III: | are rare in dicotyledonous stems |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
© 2024 GoodEd Technologies Pvt. Ltd.