Assertion: Water that enters into a plant cell through diffusion makes it turgid.
Reason: Entry of water into the cell through diffusion develops wall pressure inside the cell.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
C.
If assertion is true but reason is false
Cell's turgidity is due to turgor pressure. Turgor pressure is the pressure which develops in the confined part of an osmotic system due to osmotic entry of water into it. It is also called hydrostatic pressure or pressure potential. The force exerted by the cell wall over the protoplast is called wall pressure. Normally wall pressure is equal and opposite to turgor pressure except when the cell becomes flaccid.
Assertion: Movement of materials inside phloem is bidirectional i.e. it can be both upwards or downwards.
Reason: Movement of molecules inside xylem is unidirectional i.e. always upwards.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
A scion is grafted to a stock. The quality of fruits produced will be determined by the genotype of
stock
scion
both stock and scion
neither stock nor scion.
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 form lenticels
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Grafting is successful in dicots but not in monocots because the dicots have
vascular bundles arranged in a ring
cambium for secondary growth
vessels with elements arranged end to end
cork cambium
In the sieve elements, which one of the following is the most likely function of P-proteins
Deposition of callose on sieve plates
Providing energy for active translocation
Autolytic enzymes
Sealing mechanism on wounding
In active transport, carrier proteins are used, which use energy in the form of ATP, to
transport molecules against concentration gradient of cell wall.
transport molecules along concentration gradient of cell membrane.
transport molecules against concentration gradient of cell membrane.
transport molecules along concentration gradient of cell wall.
Assertion : Shrinkage of the protoplast of a cell occurs under the influence of hypertonic solution.
Reason : Hypertonic solution causes plasmolysis.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false
Assertion: Light is one of the important factor in transpiration.
Reason: It induces stomatal opening and closing. Therefore, transpiration increases in light and
decreases in dark.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
