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Passive absorption of water by root of a plant is affected by?

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Important Questions on Transport in Plants

MEDIUM
Biology>Plant Physiology>Transport in Plants>Transpiration

Study the diagram and the list given below.

Question Image

i) Chloroplast

ii) Epidermal cell

iii) Guard cell

iv) Subsidiary cell

v) Stomatal pore

The correct match is

EASY
Biology>Plant Physiology>Transport in Plants>Transpiration
Which one gives the most valid and recent explanation for stomatal movements?
MEDIUM
Biology>Plant Physiology>Transport in Plants>Transpiration
Which of the following facilitates opening of stomatal aperture?
EASY
Biology>Plant Physiology>Transport in Plants>Transpiration
Stomata in grass leaf are
EASY
Biology>Plant Physiology>Transport in Plants>Transpiration

Identify the correct match of the type of water given in column-I and its character in column-II and select the correct option.

Column-I Column-II
(i) Capillary water (a) present in the form of hydrated oxides of silicon and aluminium.
(ii) Hygroscopic water (b) goes down through large pores between soil particles and reaches the water table.
(iii) Combined water (c) held in between small non-colloidal soil particles.
(iv) Gravitational water (d) held tightly around soil particles by adhesive forces.
MEDIUM
Biology>Plant Physiology>Transport in Plants>Transpiration
Take two plants, keep plant A in very dry conditions and plant B in high humidity. Simultaneously, immerse the roots of both plants in water with a red dye. What would you observe?
MEDIUM
Biology>Plant Physiology>Transport in Plants>Transpiration
Three uniformly watered plants i, ii and iii were kept in 45% relative humidity, 45% relative humidity with blowing wind and 95% relative humidity, respectively. Arrange these plants in the order (faster to slowest) in which they will dry up.
HARD
Biology>Plant Physiology>Transport in Plants>Transpiration
How does ascent of sap takes place in tall trees?
EASY
Biology>Plant Physiology>Transport in Plants>Transpiration
The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is
HARD
Biology>Plant Physiology>Transport in Plants>Transpiration
Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening, carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of the following options:
MEDIUM
Biology>Plant Physiology>Transport in Plants>Transpiration
Stomatal movement is not affected by
EASY
Biology>Plant Physiology>Transport in Plants>Transpiration
A column of water within xylem vessels of tall trees does not break under its weight because of:
MEDIUM
Biology>Plant Physiology>Transport in Plants>Transpiration
Explain apoplast pathway of water in plants. Draw a diagram to show major paths of water flow in plant cells.
EASY
Biology>Plant Physiology>Transport in Plants>Transpiration

Given below is a diagram of the stomatal apparatus. Match the labels with the corresponding names of the compounds. 

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Choose the correct combination.

EASY
Biology>Plant Physiology>Transport in Plants>Transpiration
If the humidity of the atmosphere suddenly increases substantially, the water flow in the xylem will-
HARD
Biology>Plant Physiology>Transport in Plants>Transpiration
How does ascent of sap occur in tall tree?
EASY
Biology>Plant Physiology>Transport in Plants>Transpiration
Transpiration and root pressure cause water to rise in plants by:
HARD
Biology>Plant Physiology>Transport in Plants>Transpiration
A submarine has a window of area 30×30 cm2 on its ceiling and is at a depth of 100 m below sea level in a sea. If the pressure inside the submarine is maintained at the sea-level atmosphere pressure, then the force acting on the window is (consider density of sea water =1.03×103 kg m-3 acceleration due to gravity =10 m s-2):
EASY
Biology>Plant Physiology>Transport in Plants>Transpiration
Root pressure is usually acidic because:
EASY
Biology>Plant Physiology>Transport in Plants>Transpiration
In plants water ascends through