Advertisements
Advertisements
प्रश्न
The alongside diagram A shows a root hair growing through the soil particles. Diagram B is the root hair of an aquatic plant.
(i) Name the parts 1,2,3.
(ii) Name two substances which enter the root hair. What are their uses?
(iii) By what process do these substances enter the root hair?
(iv) Account for the different shapes of root hairs in the two diagrams.
Advertisements
उत्तर
(i) 1-Nucleus. 2-Cell wall. 3-Cytoplasm of the root hair cell.
(ii) 1. Water: Carries minerals to the plant.
2. Minerals: They are needed for healthy plant growth.
(iii) Osmosis.
(iv) In the Fig. A, the root hair has to pass through the soil particles, and as such, they are not straight. In the Fig. B, the root hair has no obstruction in water, and as such it grows straight.
APPEARS IN
संबंधित प्रश्न
State whether the following statement is true or false. Rewrite the false statement correctly.
Water absorption mainly occurs through the root-hair.
How is root hair adapted for the absorption of water from the soil?
What part is played by The cytoplasm in the uptake of water into the root hair?
Three plants (a), (b) and (c) were placed in beakers containing coloured water. The water in each beaker was covered with a layer of oil. The leaves were removed from plant (b), while plant (c) was exposed to strong light.
(i) In which plant, (a), (b) or (c) would the water move up the fastest?
(ii) In which plant (a), (b) or (c), would the water move up slowly?
(iii) Why was the water covered with a layer of oil?
(iv) What is being investigated by this experiment?
Choose the correct answer:
The water is translocated upwards from the roots through _____________
Choose the correct answer:
Exudation or bleeding is associated with ___________
Mention whether the following statement is true (T) or false (F) and give an explanation in support of your answer.
Guttation in plants occurs maximum at midday.
Draw a diagram of the root hair cell as it would appear when a concentrated solution of fertilizers is added near it.
A thin strip of epidermal cells of a leaf was observed in a drop of water. They all looked turgid and normal.
(a) Draw a diagram of such a cell.
(b) Draw a diagram of a cell if this strip is transferred to a strong concentrated solution of sugar. What is term used for the effect on the cells ?
Multiple Choice Question:
The most widely accepted theory for ascent of sap is ______.
