Transport of water and minerals - class-XII
Description: transport of water and minerals | |
Number of Questions: 43 | |
Created by: Karuna Seth | |
Tags: absorption by roots - the processes involved major activities of living organisms biology transportation in plants and circulation in animals mineral nutrition in plants transport in plant |
Which part In roots has transport proteins that are control points, where a plant adjuste the quantity & types of solutes that reach the xylem.
The structures present in the roots to absorb water and minerals are
Scum float on the surface of water because
Select the correct sequence of passive absorption path of water in a plant
Suitable temperature for active absorption of water by root is
At low temperature water absorption decreases due to
(I) An increase in the viscosity of water and protoplasm.
(II) A decrease in the permeability of cell membranes.
(III) A decrease in the metabolic activities of root cells.
(IV) A check in the growth and elongation of roots.
In poorly aerated soil, the rate of water absorption will
Root cap plays no role in the absorption of water in a plant, because
Water and minerals travels upwards through _________
Many transplanted seeding may not survive because
Maximum absorption of water by a root occur in the region of
When the concentration of the soil solutes is low, the absorption of water is
During absorption of water by roots, the water potential of cell sap is lower than that of
Which of the following statement(s) is/are incorrect?
When concentration of solutes is low in the soil, absorption of water is
Lignin and cellulose have affinity for water. This is called
A water-logged soil is physiologically dry because of
Root hair absorbs water from soil through
Loss of water taken place through.
Whose water potential is less than water potential of root hair during water absorption (by root hair)?
Match List I with List II and select the correct answer using the codes given the lists.
List-I(significance of the phenomenon in cell-water relations) | List-II(Quantity) |
---|---|
a. Degree of hydration of protoplasm | $1$. Wall pressure |
b. Stretches cell walls and may lead to their enlargement if the walls are sufficiently plastic | $2$. Water potential |
c. Increases the free energy of water molecule | $3$. Turgor pressure |
d. Indicates the direction of diffusion of water | $4$. Osmotic potential |
Rate of water absorption can be increased through
Roots play insignificant role in absorption of water in
The transpiration-driven ascent of xylem sap depends mainly upon _______ property of water.
Which of the following statements is incorrect?
Which of the four most abundant elements in most plants (C, H, O and N), does a terrestrial green plant procure mainly through its roots from the soil?
Choose the correct answers from the alternatives given.
Pressure on a plant cell wall caused by the osmotic movement of water is called
Choose the correct answers from the alternatives given.
During the day most plants lose .......... and take up ..........
The most important factor for absorption of water in plants is?
Which is not true regarding active water absorption?
Death of protoplasm is a pre-requisite for a vital function like
Which of the following would not contribute to water uptake by plant cell?
The active uptake of minerals depends upon
Which of the following helps to move the water from root to xylem vessels?
Identify the vascular tissues in plants.
The absorption of water is not affected when
For absorption of water, the roots act as
Optimum temperature for water absorption by plants is
Choose the correct answers from the alternatives given.
An arachnid differs from a crustacean because:
Osmotic potential and pressure potential of three cells, a, b, c located in different parts of an actively transpiring plant are:
Cell | O.P (MPa) | P.P. (MPa) |
---|---|---|
a | -0.87 | 0.44 |
b | -0.92 | 0.34 |
c | -0.68 | 0.27 |
Which ones are root hair, root cortical and mesophyll cells respectively?
Water absorption mainly occurs through the root-hair.
Water absorbed by the roots reaches the leaves and is used in producing food for the entire plant.