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प्रश्न
Choose the correct answer:
Absorption of water from soil takes place by __________
पर्याय
root cap region
root hairs
elongation zone
maturation zone
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उत्तर
Absorption of water from soil takes place by root hairs
APPEARS IN
संबंधित प्रश्न
The process by which root hairs absorb water from the soil.
Which one of the following is a characteristic NOT related with the suitability of the roots for absorbing water?
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?
Process of ascent of sap in plants occurs by ______.
Study the experimental setup in the figure and then answer the question that follow.
What is meant by 'semipermeable membrane'?
Draw a diagram of the root hair cell as it would appear when a concentrated solution of fertilizers is added near it.
The diagram given below represents the result of an experiment conducted on two freshly taken shoots of a green herbaceous plant. The lower ends dip in the water.
(i) What is the aim of the experiment?
(ii) Some parts of the stem in both the shoots have been removed. Name the conducting tissue in shoot A and in shoot B, that has been removed.
(iii) What are the results of this experiment?
A thin strip of epidermal cells from the fleshy scales of an onion bulb was examined in a drop of water, under a microscope. All the epidermal cells looked alike and the figure alongside represents one of them. The thin strip was then transferred to a drop of strong sugar solution and re-examined under the microscope after about five minutes.
(i) Make a sketch of one of the epidermal cells, as it might appear after immersion in a strong sugar solution. Label any two parts which have undergone a change.
(ii) Give the scientific term for the change shown in Q.(i) above.
(iii) What would you do to bring this cell back to its original condition?
(iv) Give the scientific term used for the recovery of the cell as a result of the step taken in Q.(iii) above.
____________plants like orchids absorb water vapours from air with the help of epiphytic roots having special tissue called velamen.
Aquatic animals like fish excrete their wastes in gaseous form as ______.
