Pinus has an/a…….. association with mycorrhizae and their …….. without the presence of mycorrhizae.

(1) Obligate, seeds cannot germinate

(2) Facultative, fruits cannot disperse

(3) Obligate, roots can not spread down the soil

(4) Facultative leaves cannot perform photosynthesis.

Root pressure

Water loss in liquid phase from the tip of the grass blades and leaves of herbaceous parts is called

Following are some statements which ones are not incorrect?
a. Root pressure only provide a modest push in the overall process of water transport
b. Root Pressure obviously does not play a major role in water movement up tall trees
c. The greatest contribution of root pressure may be to re-establish the continuous chains of water molecules in the xylem which often break under the enormous tensions created by transpiration
d. Most of the plants meet their need by transpiratory pull
e. The exudate of guttation has pure water only
1. a,b,d,e
2. a,b,c,d
3. b,c,d,e
4. c,d,e

Which of the following is an expected rate of upward flow in plants due to transpiratory pull?

Which of the following is a model for Transpiration?

Transpiration can be studied by

The immediate cause of opening and closing of stomata is a change in the

The inner wall of guard cell is not

The opening of stoma is also…….due to the orientation of the microfibril in the …….

of guard cells.