Stomatal opening or closing is due to
Important Questions on Transport in Plants
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?)
Study the diagram and the list given below.
i) Chloroplast
ii) Epidermal cell
iii) Guard cell
iv) Subsidiary cell
v) Stomatal pore
The correct match is
Answer the following:
Differentiate between Translocation and transpiration.
Given below is an apparatus that was set up to investigate a physiological process in plants. The setup was placed in bright sunlight. Answer the questions that follow:
(i) Name the process being studied. Define the process.
(ii) Why was the pot enclosed in a rubber sheet?
(iii) Mention two external factors which can accelerate the above process.
(iv) List two adaptations in plants to reduce the above process.
(v) Draw a neat, labelled diagram of a stomatal apparatus.
Given below is a diagram of the stomatal apparatus. Match the labels with the corresponding names of the compounds.
Choose the correct combination.
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. |
Choose the most appropriate statement from the options listed below that explains the factors which affects transpiration:
(A) If the wind blows faster, the water vapour released during transpiration is faster.
(B) Increase in atmospheric pressure increases the rate of transpiration.
(C) Decrease in temperature allows more water to evaporate.
(D) High humidity in the air increases the rate of transpiration.
Differentiate between the following pairs on the basis of what is indicated in the brackets.
Hypotonic solution and Hypertonic solution [condition of a plant cell when placed in them].
