Define the following term :
Root pressure
Important Questions on Absorption by Roots - The Processes Involved
Give reason for the following:
If you sprinkle some common salt on grass growing on a lawn, it is killed at that spot.
Give reason for the following:
If you uproot a plant from the soil, its leaves soon wilt.
It is better to transplant seedlings in a flowerbed in the evening and not in the morning.
Give reason for the following:
A plant cell when kept in a hypertonic salt solution for about 30 minutes turns flaccid.
Give reason for the following:
Potato cubes when placed in water become firm and increase in size.
A leaf cell of a water plant was placed in a liquid other than pond water. After sometime, it assumed a shape as shown below :
(a) Give the term for the state of the cell it has acquired.
(b) Name the structure which acts as a selectively permeable membrane.
(c) Comment on the nature (tonicity) of the liquid surrounding the cell.
(d) Name any one feature of this plant cell which is not present in an animal cell.
(e) Redraw in the space provided, the diagram of the cell if it is soon placed in ordinary water for some time.
