EASY
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Dumbbell shaped guard cells are found in

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Important Questions on Transport in Plants

EASY

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
Stomatal movement is not affected by
EASY

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.

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

Study the diagram and the list given below.

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i) Chloroplast

ii) Epidermal cell

iii) Guard cell

iv) Subsidiary cell

v) Stomatal pore

The correct match is

MEDIUM
Which of the following facilitates opening of stomatal aperture?
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Which one gives the most valid and recent explanation for stomatal movements?
HARD
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
Stomata help in the process of
EASY
Plants use which of the following to breathe
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Which of the following helps the plant in gaseous exchange?
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In plant excess amount of carbon dioxide escapes through the
MEDIUM
Name the tiny pores present on the leaf surfaces.
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The cells surrounding the stomatal pore are
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The process by which a plant loses water through the stomata is called
EASY
Name the tiny pores on leaf which help in breathing. (Meristem/Stomata)