Self Studies
Self Studies
Self Studies
Self Studies

Transport in Plants Test - 58

Result Self Studies

Transport in Plants Test - 58
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following is appropriate for mass-flow hypothesis?
    Solution
    • According to the mass-flow hypothesis, there is a mass flow of mineral ions into the root along with transpiration current. Actually, transpiration creates a suction pressure or transpiration pull, conveyed from leaf xylem to root hair, which causes absorption of water from the soil passively. 
    • A large amount of ions are also absorbed along with the absorption of water.
    • When the rate of transpiration is high, absorption of water increases due to increased suction pressure and along with water, absorption of ions also increases. Hence, all the given options are correct.
    Thus the correct answer is option D.
  • Question 2
    1 / -0
    What happens when concentration of solutes decreases in guard cells?
    Solution
    Water Potential is the difference in the free energy or chemical potential per unit molar volume of water in system and that of pure water at the same temperature and pressure.Water potential (Ψ) = pressure potential (Ψp) + solute potential (Ψs). A decrease in solute concentration in guard cells will cause decrease in solute potential and thus, an increase in the water potential. Thus the correct answer is option A.
  • Question 3
    1 / -0
    Whose water potential is less than water potential of root hair during the water absorption by root hair?
    Solution
    Water always moves from area of high water potential to area of low water potential, i.e from less negative to more negative. During water absorption by root hair the water movement is possible if water potential of vacuolar sap is lower than root hair water potential. 
  • Question 4
    1 / -0
    Which of the following does not affect water potential of water?
    Solution
    Water potential is the difference between free energy of water molecules in pure form and energy of water in the solution. The three major factors that influence water potential are solute concentration, atmospheric pressure and gravity. Thus, The correct option is D.
  • Question 5
    1 / -0
    During rainy season wooden doors and windows are not properly closed, why?
    Solution
    Imbibition is a process in which the biological colloidal substances absorb water and show swelling and increase in volume. This happens when the wood of doors and window absorb water and swell during rainy season and cause problems as these do not fit in the frame and do not get closed.
  • Question 6
    1 / -0
    Root pressure is measured by
    Solution
    The instrument used to measure root pressure is known as Manometer. The auxanometer  is used to measure plant growth and also pressure developed in the Xylem cells of roots
    So, the correct answer is 'Manometer'
  • Question 7
    1 / -0
    The process by which the soaked seeds absorbs water is known as
    Solution
    The process by which the soaked seeds absorbs water is known as imbibition. It helps in the easy breaking of seeds and helps in germination.
    Diffusion is the process by which the molecules or ions move from the region of higher concentration to lower concentration.
    Osmosis is the process by which the molecules or ions move from the region of higher concentration to lower concentration by a semipermeable membrane. 
    So, the correct answer is option A.
  • Question 8
    1 / -0
    Osmoregulation of internal environment of a cell is chiefly regulated by 
    Solution
    Osmosis is regulated by Vacuole as it stores large amount of water and minerals.
    Ribosomes are involved in protein synthesis.
    Plastids are involved in photosynthesis.
    Mitochondria generates energy for the cell.
    So the correct answer is ' Vacuoles'.
  • Question 9
    1 / -0
    Solute potential of a solution is always 
    Solution
    The solute potential of a solvent is always less than zero' since it has a negative value. This is because the addition of more solute reduces the Water potential of the solution.
    So the correct answer is '<0'.
  • Question 10
    1 / -0
     Passive water absorption by root system is due to 
    Solution
    Transpiration causes a negative pressure region in the xylem . The leaves and other apical parts require huge amounts of water as it is lost in Transpiration. So the stomata takes up the water from the intercellular spaces of the neighbouring cells that in turn draw water from the xylem . Hence a tension or negative pressure region is created in the xylem tissue. This process significantly drops the water potential in the xylem as well as the root region and the water potential of the soil is higher than the roots. So the roots start absorbing water passively as water flows from high water potential to low water potential. Hence Transpiration causes passive absorption of water in roots.
    So the correct answer is 'Tension in sap due to transpiration'.
Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now