Root Pressure
Trending Questions
I. Root pressure provides a light push in the overall process of water transport.
II. Most plants meet their water need by transpiration pull.
III. The greatest contribution of root pressure may be to re-establish the continuous chains of water molecule in the xylem vessel which often break under enormous tension created by transpiration.
IV. Guttation is the cause of transpiration pull.
The correct statements are
- I, II, 111, IV
- I, II, Ill
- II, Ill, IV
- II, Ill
The instrument used for measuring the rate of transpiration is
Photometer
Potometer
Porometer
Lactometer
- passive absorption
- active absorption
- increase in transpiration
- facilitated diffusion
- transpiration is high and absorption is very low
- transpiration is very high and absorption is also high
- transpiration is very low and absorption is high
- transpiration and absorption both are low
- vacuolar path
- cytoplasm
- plasmodesmata
- cell wall
What role does root pressure play in water movement in plants?
- Palisade parenchyma
- Epidermis only
- Apical meristem only
- Both apical and axillary meristems
Root Hair absorbs water from the soil through
Turgor pressure
Ion exchange
Osmosis
DPD
- Haploid plants
- Slow growing cultures
- Somaclonal variations
- Virus free plants
- Cell division
- Cell dedifferentiation
- Cell differentiation
- Redifferentiation
a. Meristematic cells near root tip
b. The cells in the elongation zone of the root
Vacuoles are absent in merismatic plant cells.
- True
- False
What role does root pressure play in water movement in plants?
- Transpiration is high and absorption is very low
- Transpiration is very low and absorption is high
- Both transpiration and absorption are low
- Transpiration is very high and absorption is also high
- symplastic
- apoplastic
- vacuolar
- transcellular
- Well aerated soil
- Highly concentrated soil solution
- Optimum soil temperature
- Available water in soil
- passive absorption
- active absorption
- increase in transpiration
- facilitated diffusion
a.Differentiation
b.De-differentiation
c.Redifferentiation
- Root pressure
- Capillarity and tensile strength
- Transpiration
- Cohesion and adhesion
Name the process/term for the statements given below:
The process in which intact plant lose water in the form of water droplets.
Assertion: Root pressure can provide a modest pull in the overall water transport in plants.
Reason: It does play an important role in water movement in tall trees.
if both A and R are false.
if both A and R are true but R is not the correct explanation of A
if both A and R are true and R is the correct explanation of A
if A is true but R is false
- Transpiration is high and absorption is very low
- Transpiration is very low and absorption is high
- Transpiration is very high and absorption is also high
- Transpiration and absorption both are slow
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1619971/original_apoplast.png)
- A- Transmembrane, B- Capillary, C- Endodermis
- A- Vacuolar path, B- membrane pathway, C-Casparian strips
- A- Symplast, B- Apoplast, C- Casparian strip
- A- Apoplast, B-Symplast, C- Endodermis
- Guttation
- Transpiration pull
- Root pressure
- Imbibition
- 1 and 2
- 1 and 3
- 2 and 4
- 3 and 4
(i) Radial vascular bundle (ii) Rigor mortis (iii) Root pressure
ColumnIColumnIIA.Girdling experiment1.Translocation in phloemB.Cobalt−chloride paper method2.Unequal transpiration on leaf surfacesC.Crescograph3.GrowthD.Bell−jar experiment4.Transpiration
- A. 1 B. 2 C. 3 D. 4
- A. 4 B. 3 C. 1 D. 2
- A. 4 B. 1 C. 2 D. 3
- A. 2 B. 1 C. 4 D. 3