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Guttation is seen in

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Important Questions on Plant Water Relation

MEDIUM

Given below are two statements:

Statement I: The forces generated by transpiration can create pressures sufficient to lift a xylem sized column of water over 130 metres high.
Statement II: Transpiration cools leaf surfaces, sometimes 10 to 15 degrees, by evaporative cooling.

In the light of the above statements, choose the most appropriate answer from the options given below:

EASY
Draw a diagram of stomata of Rheo leaf and write any two functions of stomata.
MEDIUM
Explain Transpiration pull theory.
HARD
"Transpiration is a necessary evil". Discuss.
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.
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?
HARD
"Transpiration is a necessary evil". Explain.
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

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

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.

EASY
Transpiration and root pressure cause water to rise in plants by:
EASY
The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is
EASY
Guttation is found mostly in
EASY
Which of these is not a waste material excreted by plants?
MEDIUM
Water lost by guttation is
EASY
Which of the process is responsible for loss of sugars and salts from plants?
EASY
The _____ thrown out of the plant adds to the water cycle.
EASY
The process of exudation of liquid drops from the edges of leaves is
EASY
Water is lost as liquid from plant body in