In plants, water potential is determined by major factors?

Related Mcqs:

1. The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)

   A. Deffusion
   B. Osmosis
   C. Active transport
   D. None of these

2. ___________ potential is the measure of the change in water potential of a system due to the presence of solute molecules?

   A. Osmotic
   B. Pressure
   C. Both of these
   D. None of these

3. Water potential of pure water is__________?

   A. zero
   B. one
   C. negative
   D. two

   Submitted by: Maryam Aftab

4. Abscisic acid promotes flowering in short day plants and inhibits in long day plants, which of the following is antagonistic to abscisic acid in terms of flowering______________?

   A. Gibberellins
   B. Cytokinins
   C. Auxins
   D. Ethene.

5. Epiphytes are plants which depend on other plants for________?

   A. food
   B. mechanical support
   C. shade
   D. None of these

   Submitted by: Tauqeer Ahmad Rajput

6. In which of the following pigments major energy reserves and cell wall are like plants?

   A. Rhodophyta
   B. Chlorophyta
   C. Phaeophyta
   D. Chrysophyta

7. In all plants the major sites of phosynthesis are___________?

   A. Leaves respire and utilize O2 and release CO2.
   B. Stems
   C. Roots
   D. Branches

8. The pressure generated when water enters & inflates plant cells is called ___________ potential?

   A. Water
   B. Osmotic
   C. Pressure
   D. Solute

9. Addition of salts and other solutes from other cells into xylem sap, __________ the water potential of the xylem sap

   A. Increases.
   B. Lowers.
   C. Doesn’t effect.
   D. Maintains.

10. Commonly in other plants than tall ones the speed of upward movement of water is____________?

    A. 8mh-1
    B. 1 mh-1
    C. 7 mh-1
    D. 4 mh-1