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Class 12
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Stomata in Leaves
Stomata in Leaves
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1)
What is stomata?
Stomata are fibre present inside the cell
Stomata are turgor pressure in plants
Stomata are scattered vascular bundles of plant cell
Stomata are minute pores found on the epidermis of leaves
2)
What are guard cells?
All of these
It is a pair of bean shaped specialized cells that surrounds the pore
They are irregular shaped cells
Long and cylindrical in shape
3)
In plants the closing of stomata is reduced due to
Amount of carbon dioxide entering in the leaf only
All of these
Respiration rate
Rate of transpiration and amount of carbon dioxide entering in leaf
4)
The opening and closing of stomata take place due to
Hormonal change in guard cells
Contraction of outer wall of guard cells
Due to elasticity of inner wall of guard cells
Turgor pressure that changes in guard cells
5)
Which of these is the function of stomata?
Water is released through the stomata into the atmosphere in the form of water vapor
It facilitates carbon dioxide uptake and release of oxygen during the process of photosynthesis
It maintains the moisture balance according to weather by opening and closing
All of these
6)
When do the guard cells become flaccid?
None of these
During respiration
During gaseous exchange
When they lose water
7)
The stomatal pore closes at night due to
Hormonal change
Reduce in respiration
Reduce in transpiration
Maintenance of moisture balance
8)
If turgidity of a cell surrounded by water increases, the wall pressure will
Remain unchanged
Fluctuate
Decrease
Increase
9)
What is the main function of guard cells?
To control the moisture balance
To maintain the amount of water in cell
To control the temperature
To control the opening and closing of stomatal pore
10)
Identify the correct labeled part in the given figure
1. Stomata 2. Nucleus 3. Chloroplast
1. Chloroplast 2. Guard cell 3. Outer wall
1. Stomatal pore 2. Chloroplast 3. Guard cell
1. Nucleus 2. Cytoplasm 3. Inner wall
