Study the following statements and choose the correct option$(s)$ from the codes below:
$I$. Root pressure provides a light push in the overall process of water transport.
$II$. Root pressure causes the flow of water faster through xylem than it can be lost by transpiration.
$III$. In symplast pathway,water moves exclusively through the cell wall and intercellular spaces.
$IV$. Guttation is a cause of transpiration pull.
$V$. Most plants fulfill their water requirement by transpiration pull.

  • A
    $I, II$ and $III$ are correct while $IV$ and $V$ are incorrect.
  • B
    $IV$ and $V$ are correct while $I, II$ and $III$ are incorrect.
  • C
    $I$ and $V$ are correct.
  • D
    $II$ and $III$ are correct while $I, IV$ and $V$ are incorrect.

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Choose true and false statements from the following:
$I.$ Mycorrhizal association between fungus and root of plant $(Pinus)$ is often obligate.
$II.$ $Pinus$ and orchid seeds can germinate and grow into plant in absence of mycorrhizal association.
$III.$ Absorption of water along with mineral solute by root hairs is purely a process of diffusion.
$IV.$ In apoplast pathway,movement of water takes place through cell wall and intercellular spaces.
$V.$ Fungal hyphae provide sugar and organic internal to root.
Choose the correct option.

Which of the following is mismatched regarding the properties of water and their biological significance?

Given below are two statements in relation to the limitations of the capillarity theory of water transport in plants.
Statement $I$: Xylem, i.e., the capillarity tube, must be with closed end walls and not hollow.
Statement $II$: The capillarity tube, i.e., xylem, is not in direct contact with soil water and contains a barrier of root cells between the xylem and soil water.
In the light of the above statements, choose the most appropriate answer from the options given below:

Identify the correct statements from the following:
$I-$ Xylem transports only inorganic nutrients.
$II-$ Phloem transports only organic materials.
$III-$ There is an exchange of materials between xylem and phloem.
$IV-$ In xylem,inorganic nitrogen is present along with organic nitrogen in the form of amino acids and other components.
$V-$ Organic phosphorus and sulfur are also found in xylem tissue.

After heavy rainfall with poor drainage,leaves of many plants wilt due to

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