Question 1 :
Opening and closing of stomata is due to the : -

Question 3 :
Pathway of water inside plant body after its absorption is by<br>

Question 7 :
Force developed in cortex of root which pushes water into xylem of root is

Question 8 :
When plant cells are kept in a concentrated salt solution, they are<br>

Question 9 :
Plants absorb water from the soil or water reservoir and add it to the atmosphere as vapour by the process of

Question 10 :
Which part of the root is mainly concerned with absorption of minerals?<br>

Question 12 :
Which of the following is related with transfer of food material?

Question 16 :
By which of the following mechanisms is glucose reabsorbed from the glomerular filtrate by the kidney tubule?

Question 17 :
Among these groups, one element is involved in opening and closing of stomata, the other helps to maintain ribosome structure. Choose the correct option.

Question 18 :
The root pressure theory considers ........... responsible for the ascent of sap.

Question 31 :
Select the correct events leading to the opening of the stomata<br>(i) Decline in guard cell solutes<br>(ii) Lowering of osmotic potential of guards cells<br>(iii) Rise in potassium levels in guard cell<br>(iv) Movement of water from neighbouring cells into guard cells<br>(v) Guards cells becoming flaccid<br><br>

Question 34 :
Choose the correct answer from the alternatives given.<br>Which of the following processes requires the greatest expenditure of energy by the cell?

Question 35 :
During rainy season wooden doors and windows are not properly closed, why?

Question 37 :
ATP molecules combine with carrier molecules and allow passage of substances.

Question 40 :
If two solution have the same osmolarity, they are said to be<br/>