Advertisements
Advertisements
Question
Distinguish between the following:
Stomata and lenticels
Advertisements
Solution
| Stomata | Lenticels | ||
| 1. | There are two guard cells in the shape of beans surrounding these small openings. They can be opened and closed. | 1. | There are no guard cells surrounding these special openings. They remain open all the time |
| 2. | They are mostly found on the abaxial surface of leaves. | 2. | These are found on the surface of older woody stems. |
| 3. | These are responsible for the diffusion of gases during photosynthesis and respiration. They also help in transpiration. | 3. | These are mainly responsible for diffusion of gases during respiration. They also help in transpiration. |
APPEARS IN
RELATED QUESTIONS
Choose the correct answer:
Stomata open during day time because guard cells
State the functions of guard cells.
Given below are the diagrams of a certain structure in plants in two conditions.

(i) Name the structure shown.
(ii) Name the parts numbered 1-5.
(iii) What is the most apparent difference between A and B in the structure shown?
(iv) Describe the mechanism which brings about the change in the structure depicted in A and B.
Given below is an experimental set up to study a particular process:

(i) Name the process being studied.
(ii) Explain the process named in (i) above.
(iii) Why is the pot covered with a plastic sheet?
(iv) Mention one way in which this process is beneficial to the plant.
(v) Suggest a suitable control for this experiment.
Given below is an apparatus used to study a particular process in plants. Study the same and answer the questions that follow :

(i) Name the apparatus.
(ii) Mention one limitation of this apparatus.
(iii) Which phenomenon is studied with the help of this apparatus?
(iv) What is the function of the part marked ‘reservoir’?
(v) What is the role of the air bubble in the experiment?
Draw a labeled diagram of the stomatal apparatus and label the following in it: Stoma, Guard cells, Chloroplast, Epidermal cells, and Cell wall.
Write the functional activity of the following structure:
Stomata
