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.

(i)-(c), (ii)-(d), (iii)-(a), (iv)-(b)

(i)-(c), (ii)-(d), (iii)-(b), (iv)-(a)

(i)-(c), (ii)-(a), (iii)-(b), (iv)-(d)

(i)-(c), (ii)-(b), (iii)-(d), (iv)-(a)

In day time - for gaseous exchange

In day time - no gaseous exchange

In nighttime only - for gaseous exchange

In nighttime only - no gaseous exchange

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When an oak leaf stoma is open more widely, the most likely process involved is

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Important Questions on Transport in Plants

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Biology>Plant Physiology>Transport in Plants>Transpiration

Stomatal movement is not affected by

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.

EASY

Biology>Plant Physiology>Transport in Plants>Transpiration

Stomata in grass leaf are

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Biology>Plant Physiology>Transport in Plants>Transpiration

Which one of the following anatomical structures is involved in guttation?

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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:

EASY

Biology>Plant Physiology>Transport in Plants>Transpiration

If the humidity of the atmosphere suddenly increases substantially, the water flow in the xylem will-

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?

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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

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.

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

MEDIUM

Biology>Plant Physiology>Transport in Plants>Transpiration

Which of the following facilitates opening of stomatal aperture?

MEDIUM

Biology>Plant Physiology>Transport in Plants>Transpiration

Choose between the two options to answer the question specified in the brackets for the following.

An example is illustrated below.

Example: Corolla or Calyx (Which is the miter whorl?) Answer: Calyx

Lenticels or stomata (Which one remains open always?)

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.

Question Image

Choose the correct combination.

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Biology>Plant Physiology>Transport in Plants>Transpiration

Transpiration and root pressure cause water to rise in plants by:

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Biology>Plant Physiology>Transport in Plants>Transpiration

Which one gives the most valid and recent explanation for stomatal movements?

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Biology>Plant Physiology>Transport in Plants>Transpiration

In barley type of plant, the stomata open

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Biology>Plant Physiology>Transport in Plants>Transpiration

Stomata opens:

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Biology>Plant Physiology>Transport in Plants>Transpiration

In succulent plants, the stomata open in the night and close in the day. Which among the following would be the best hypothesis to explain the mechanism of stomatal action in the night only?

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Biology>Plant Physiology>Transport in Plants>Transpiration

Which of the following statements is/are not true?

1. In CAM plants, stomata open during dark and remain closed during the day.

2. Role of

N a^{+}

in stomatal opening is now universally accepted.

3. The water potential of root cells is higher than the water potential of soil.

4. Capillarity theory is the most accepted theory of water movement through plants.

5. The walls of xylem vessels made up of lingo-cellulose have strong affinity for water molecules.

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Biology>Plant Physiology>Transport in Plants>Transpiration

For photoactive opening of stomata, the proton transport concept was given by

When an oak leaf stoma is open more widely, the most likely process involved is

Important Questions on Transport in Plants

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