Page 3 - Assignment-Questions-Transport in Plants

D. Short Answer Questions-I (3 marks each)

16. When any dry plant material or seeds are kept in water, they swell up.
(a) Name the phenomenon involved in this change.
(b) Define this phenomenon.
(c) Give two conditions essential for the phenomenon to occur.
17. Plants show temporary and permanent wilting. Differentiate between the two. Do
any of them indicate the water status of the soil?
18. What is mycorrhiza ? How is the mycorrhizal association helpful in absorption of
water and minerals in plants?
19. Observe the given figure and give the answers of the following:
(a) Identify the process occurring in (I), (II) and (III).
(b) Differentiate between the process II and III.
(c) How many types of aquaporins form the water channels in the cell membrane?

20. Give the scientific term for the following statements/processes:
(a) Movement of water in roots through the cell wall exclusively.
(b) The positive hydrostatic pressure developed inside the cell or cell wall.
(c) A solution having relatively less concentration.
(d) Loss of water vapour from the aerial parts of the plants in the form of water
vapour.
(e) Movement of a molecule across a membrane independent of other molecule.
(f) Water loss in its liquid phase through the special openings of veins near the tip of
leaves of many herbaceous plants.