Stomata
Trending Questions
Mention the major events during photosynthesis?
What are stomata? Write its function.
Explain the mechanism of closing and opening of the stomata.
Give two points of importance of transpiration in plants?
Which surface (upper or lower ) is the dorsal and which is ventral side of a leaf?
In the process of photosynthesis , food A is prepared which gets converted to food B . What are lA and B ? Why is A converted to B.
In cactus, photosynthesis is carried out in the
Name the pores in a leaf through which respiratory exchange of gases takes place.
What is the process by which plants lose water?
Which of the following factors affect the rate of photosynthesis in a plant?
All of the above
Temperature
Light
Chlorophyll
What are the factors affecting stomatal movement?
What are the raw materials needed for the photosynthesis ?for 2or &3marks
For stomata to close, guard cells have to show :
More turgidity
Plasmolysis
Less turgidity
Both B and C
The shape of guard cells changes due to change in the:
protein composition of cells
temperature of cells
amount of water in cells
position of the nucleus in the cells
The main function of the leaf is
Transpiration
Exchange of gases
Photosynthesis
Cooling
In the plant shown below, during photosynthesis, what happens first?
Carbon dioxide absorption followed by absorption of light.
Carbon dioxide reduction and absorption of light simultaneously.
Depends on carbon dioxide levels in the surroundings.
Sunlight absorption then reduction of carbon dioxide.
The gaseous wastes of respiration and photosynthesis in plants are removed through :
Lenticels of stem
Stomata of leaves
None of these
Stomata and lenticels
Guard cells regulate the opening and closing of stomata.
True
False
Given below is a diagrammatic sketch (surface view) of a stomatal apparatus from a dicot leaf.
(a) Label the parts numbered 1-3.
(b) Is this state, open or closed?
(c) Is this stoma, of a dicot leaf or a monocot leaf?
(d) Redraw a sketch of the stomatal apparatus in the state opposite to the one shown here.
Stomatal openings are surrounded by
When plants under go transpiration how is the water that was takes as a liquid get converted into gas and released?
What is the name of those cells in the leaf of a plant which control the opening and closing of stomata?
The tiny pores through which carbon dioxide from the atmosphere enters the leaves are known as:
Chlorophyll
Stomata
Xylem
Phloem
Rearrange the letters in the following words and match them with their correct descriptions.
1. RUGDA LELSC
2. HOTSITOSHEYSPN
3. ONTREGIN
4. SHARPOLOSTLC
Description
(i) Essential element used in the synthesis of proteins and other compounds in autotrophs
(ii) Performs the function of the opening and closing of stomatal pores.
(iii) Cell organelles containing chlorophyll.
(iv) The process by which autotrophs take in substances from the outside and convert them into stored forms of energy.
1-ii, 2-iv, 3-i, 4-iii
1-iii, 2-i, 3-iv, 4-ii
1-ii, 2-iii, 3-iv, 4-i
1-iii, 2-ii, 3-iv, 4-i
The opening and closing of the stomatal pores depends upon :
(a) oxygen (b) water in guard cells (c) temperature (d) concentration of CO2 in stomata
(a) How do guard cells regulate opening and closing of stomata! pores ?
(b) Two similar green plants are kept separately in oxygen free containers, one in dark and the other in continuous light. Which one will live longer ? Give reasons.
