Movement of Water in Plants
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The path of water from the soil into the xylem of the root is:
Soil → cells of cortex → root hair → phloem
Soil → root hair → cells of cortex → xylem
Soil → root hair → xylem → cells of cortex
Soil → root hair → phloem → cells of cortex
Which of the following processes requires energy in the form of ATP?
Osmosis
Diffusion
Active transport
All of the these.
With respect to the given assertion and reason, choose the correct option.
Assertion (A): Water and minerals are absorbed from roots and are transported upwards to various parts of the plant.
Reason (R): The process by which a substance absorbed from the roots of the plant is moved to the upper part of the plant is known as active transport.
- A is correct but R is incorrect
- A is incorrect and R is correct
- Both A and R are incorrect
- Both A and R are correct and R is the correct explanation of A
Name the different components of xylem and draw a living component.
The cause of guttation is mainly
Root pressure
Transpiration pull
Osmosis
Cohesive force
- Guttation
- Transpiration
- Plasmolysis
- Bleeding
How can bulk flow be achieved?
What is the transmembrane pathway?
Active uptake of minerals by root mainly depends on the-
Light
Availability of carbon dioxide
Availability of oxygen
Temperature
Why is transpiration important in plants?
It helps in the absorption of water and mineral.
It helps the plant to maintain the optimum osmotic balance.
It helps in the distribution of water and minerals throughout the plant body.
It helps in cooling the leaf surfaces.
suppose that the pot is placed inside a dark room instead a dark room instead of placing it in the sunlight for some time. What difference would be noticed?
The lower surface of ________ leaves will have more number of stomata on the surface.
isobilateral
thin
dorsiventral
thick
A flowering plant is planted in an earthen pot and irrigated urea is added in high amounts to make the plant grow faster but after some time the plant died. This may be due to-
Endosmosis
Exosmosis
Suffocation
Water logging
What do you mean by hydroscopic water and combined water in the soil? Are these available to plants?
Water droplets are seen along the leaf margins of herbaceous plants during an early morning, when evaporation is low. This phenomenon is termed ________.
Guttation
Transpiration
Evaporation
Exudation
Choose the option that best describes the direction of flow of water in the plants.
Roots, Leaves, Vessels
Vessels, Leaves, Roots
Roots, Vessels, Leaves
Leaves, Vessels, Roots
The statements given below are incorrect. Rewrite the correct statement by changing the underlined words of the statement.
Stain test shows that lot of water passes through living cells of xylem.
Complete the following statement by choosing the correct option out of those given within brackets.
Loss of water as droplets through the leaf margin of a plant is termed (bleeding/guttation/transpiration).
Given below is a group of five terms. Arrange and rewrite the terms in correct order so as to be in a logical sequence.
Endodermis, cortex, soil water, xylem, and root hair
Are special membrane proteins required for facilitated transport?
What are lenticels? Where are they found?
Opening in the leaf
Opening in the stem
Opening in the root
Opening in the flower
The following paragraph is related to absorption of water from the soil. Complete the paragraph by selecting the correct word from those given below. You may use a term only once.
channel xylem opposite endodermis cortex surface area soil particles roots water |
__________can enter plants through entire surface of plant body. However, the bulk of water is absorbed by land plants through the __________. Root hairs are in contact with__________. These provide a large __________ for water absorption. Absorbed water is transported to the__________ and endodermis. Internal to the__________ is a single layer of pericycle. The protoxylem elements of xylem lie in __________to the pericycle. This way a direct__________ is formed for the passage of water from the root hair cells to the __________.
Sundari tree, a mangrove grows _____________ that prevent salt from entering plant body.
Root barricade around tree
Root never get exposed to salt water
Root membrane
None of the choices
- CO2 released by the respiration of roots combines with soil H2O to form H2CO3.
- H2CO3.dissociates into H+ and HCO^-_3$ ions in soil solution.
- H+ ions may be exchanged for cations adsorbed on clay particles.
- Cations thus released into soil solution are adsorbed on roots cells in exchange for anions.
Given below is a set of five terms. Without changing the first term, rearrange the remaining four, so as to be in a logical sequence as per the direction given in the bracket.
Soil water, xylem, cortex, endodermis, root hair (conduction of water).
- Available to the plant
- Whole of the soil water
- Amount of water not available to the plant
- None of the above
Ragu carried out an experiment, he took two conical flasks A and B and filled them with water up to the same level. In flask A, he placed a healthy tuberose plant without root and in flask B he placed a tuberose plant with root in such a way that the bottom of both the plants remains in the water. What is his observation after a couple of hours?
The water level in both the flasks remains unchanged.
The water level in flask A decreased.
The water level in flask B decreased.
The water level in both the flasks changed.