MEDIUM
Earn 100

The water lost during transpiration _____.

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Important Questions on Plant Water Relation

EASY
Which one gives the most valid and recent explanation for stomatal movements?
EASY
Transpiration and root pressure cause water to rise in plants by:
MEDIUM
Stomatal movement is not affected by
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

HARD
"Transpiration is a necessary evil". Explain.
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
Which of the following facilitates opening of stomatal aperture?
MEDIUM
Explain Transpiration pull theory.
HARD
"Transpiration is a necessary evil". Discuss.
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.
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.

EASY
If the humidity of the atmosphere suddenly increases substantially, the water flow in the xylem will-
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
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?
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
Which one of the following is not related to guttation?
EASY
Which of the following is an effective adaptation for better gas exchange in plants?
EASY
The stomata in CAM plants open during
EASY
Water lost in guttation is?