Choose true and false statements from the following and select the correct option from the set $(A-D)$ given below:
$I.$ Diffusion is an important process of transport in plants since it is the only means for gaseous movement within the plant body.
$II.$ In active transport,pumps are proteins that use energy to carry substances across the cell membrane against the concentration gradient.
$III.$ In facilitated diffusion,special proteins help hydrophilic substances to be transported across the membrane.
$IV.$ In diffusion,molecules move against the concentration gradient in a random manner.
$V.$ Facilitated diffusion is faster than active transport.

  • A
    $I, II, III$ are true,$IV$ and $V$ are false.
  • B
    $I, II, III$ are true,while $IV$ and $V$ are false.
  • C
    $IV$ and $V$ are true,while $I, II$ and $III$ are false.
  • D
    Only $II, III, IV$ are true while $I$ and $V$ are false.

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Similar Questions

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.

From a physiological perspective,why does a high water content in soil particles lead to a dry process (physiological drought)?

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Assertion: When the ambient temperature is high and soil contains excess of water,the plants tend to lose water in the form of droplets from lenticels.
Reason: Root pressure regulates the rate of loss of water from lenticels.

$A.$ Most researchers agree that water is mainly 'pulled' upward through the plant, where transpiration is the driving force.
$B.$ Less than one percent of water reaching the leaves is used in plant growth and photosynthesis.
$C.$ Cobalt chloride paper turns blue on absorbing water.

The presence of dew on the surface of leaves is due to

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