HARD
Earn 100

How are photosynthesis and transpiration related?

Important Questions on Transport in Plants

HARD
"Transpiration is a necessary evil". Discuss.
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
Explain Transpiration pull theory.
MEDIUM
Which of the following facilitates opening of stomatal aperture?
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
Which one gives the most valid and recent explanation for stomatal movements?
HARD
"Transpiration is a necessary evil". Explain.
EASY
The water potential of pure water 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.

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

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
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
Stomatal movement is not affected by
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

The containers X and Y have 1 litre of pure water and 1 litre of 0.1 M sugar solution, respectively. Which one of the following statements would be correct regarding their water potential Ψ and osmotic potential Ψs?

*Note: There were errors in original KVPY papers, and thus the options are modified here.

EASY
The water potential ψp of pure water at standard temperature and atmospheric pressure is:
EASY
Draw a diagram of stomata of Rheo leaf and write any two functions of stomata.
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
Transpiration and root pressure cause water to rise in plants by: