Root Hair
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Water is absorbed by the root hair cells through
osmosis
active transport
diffusion
blending
Identify the correct statement from the following.
Organic and mineral nutrients undergo multi-directional transport.
Organic compounds synthesized in the leaves are transported to storage organs only.
The mineral nutrients present in the stem and leaves get transported to roots.
Hormones and other chemical stimuli are not transported from their sites of synthesis.
Turgidity is important in a plant cell. Which of the following options support this statement?
Turgidity helps the plant to stay upright.
Turgidity helps in the ascent of sap.
Turgidity helps to open and close stomata.
Turgidity helps to spread out the petals of the flowers.
- Concentration of solutes in the cell sap is high.
- Plant is rapidly respiring.
- They are separated from soil by a permeable membrane.
- The concentration of salts in the soil is high.
The pressure required to stop the process of osmosis is termed as:
Osmotic potential
Osmotic pressure
Pressure potential
Turgor pressure
Write the specific feature of the cell sap of root hairs which helps in absorption of water.
Which of the following statements is wrong?
Plants take in a small quantity of mineral salts through the root hairs.
Plants absorb only one substance at a time - water or inorganic salts.
Water and inorganic salts are taken simultaneously by the root hairs.
Roots are one of the main absorbing organs of the plant.
How does organic food move in plants?
From the image below, determine the cell which is plasmolysed, the cell that is flaccid and the turgid cell.
A- Turgid, B- Plasmolysed, C- Normal cell
A- Plasmolysed, B- Turgid, C- Normal cell
A- Plasmolysed, B- Flaccid, C- Turgid
A- Normal cell, B- Turgid, C- Plasmolysed
- Movement of molecules within the cell.
- Movement of molecules between cells.
- Evaporative loss of water from leaf to surrounding.
- Loss of energy.
Root cap has no role in absorption because it has:
no direct connection with the vascular system
loosely-arranged cells
no cells containing chloroplasts
no root hair
- Thin cell wall and less surface area
- Thin cell wall and more surface area
- Thick cell wall and less surface area
- Thick cell wall and more surface area
Which is the unknown part of this figure?
Stem cell
Root hair
Sieve tube
Petiole
(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.
- I and II are correct
- I and III are correct
- I, II and III are correct
- All are correct
Which of the following is directly responsible for taking up water from the soil in plants?
Fruits
Leaves
Root hairs
Stem