Transport in plants practice · Mixed difficulty

Arrange the events of opening stomata in correct sequence and choose the correct option accordingly I. Lowering of osmotic potential of guard cells II. Decline in guard cell solute III. Rise of potassium ion level in guard cells IV. Guard cells absorb water from neighbouring epidermal cells V. Guard cells become flaccid VI. Guard cells swells and make a pore between them

Carrier protein, which allows the movement of molecules in opposite direction is

Which one of the following is not related to guttation?

Drough avoiding plants are

Long distance transport of substances is called

Which one of the following acts as a barrier in a apoplastic pathway?

Cell A and Cell B are adjacent plant cells. In cell A, ${\psi _s} = - 20$ bars and ${\psi _p} = 8$ bars. In cell B, ${\psi _s} = - 12$ bars and ${\psi _p} = 2$ bars. Then

Facilitated diffusion does not require/show

Facilitated diffusion

What is the approximate dry weight contained by majority of herbaceous plants?

Water potential of a solution is?

Through which process, starch of the guard cell is converted into PEP ions?

Diffusion, a process occur(s) along the concentration gradient is actively involved in

Select the incorrect statement w.r.t. apoplast pathway of absorption of water in plants.

Water is absorbed on colloidal molecules by

Water potential of pure water at standard temperatures, which is not under any pressure is

Sugar stored in roots may be mobilised to become a source of food in the

Root cell in which the movement is always symplastic is

Transpiration and root pressure cause water to rise in plants by?

Sinks are related to

Root pressure

Which of the following may move across the plasma membrane by the process of simple diffusion?

Phenomenon of plasmolysis occurs when

Following statements are related with the diffusion of coloured molecules across a membrane. Select the correct statement, which shows the fastest rate of diffusion?

Actively growing plant tissues have a water content of?

Choose the false statement

RBC and a plant cell (with thick cell wall) are placed in distilled water. The solute concentration is the same in both the cells. What changes would be observed in them?

Assertion: For crops, arid areas are not suitable.

Reason : For planting crops in arid regions,
antitranspirants are used.

Which one of the following does not play a major role in upward movement of xylem sap in tall trees?

Plants growing on hills are likely to show