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Class 11
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Study of distribution of stomata
Study of distribution of stomata
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1)
Which of the following statements is true for dicot plants?
The upper surface and lower surface of a dicot leaf have an equal number of stomata.
The lower surface of a dicot leaf has a greater number of stomata than the upper surface.
The upper surface of a dicot leaf has a greater number of stomata than the lower surface.
The upper surface of a dicot leaf has no stomata.
2)
On which surface of the leaf of the water lily are more stomata present?
On both upper and lower epidermis.
Upper epidermis.
Lower epidermis.
On the edges of a leaf.
3)
Which of the following statements is true for monocot plants?
Stomata absent on the both surfaces of the leaf.
Stomata equally distributed on the upper and lower surface of the leaf.
Stomata present only on the upper surface of the leaf.
Stomata present only on the lower surface of the leaf.
4)
The equation for calculating stomatal index is:
Stomatal index=(No.of stomata)/(No of stomata+ No of epidermal cells)*100
Stomatal index=(No.of stomata)/(No of subsidary cells+ No of epidermal cells)*100
Stomatal index=(No.of stomata)/(No of stomata+ No of epidermal cells)*50
Stomatal index=(No.of Epidermal cells)/(No of stomata+ No of epidermal cells)*100
5)
Identify the missing part from the sketch of the stomatal apparatus given below.
Nuclei in guard cell
Chloroplast in the guard cell
Cell wall of the cell
Cell membrane of the cell
6)
Which of the following is true about the case of submerged aquatics plants?
Stomata absent.
Stomata present on both upper and lower epidermis.
Stomata only present in upper surface.
Stomata present on the edges of the leaf.
7)
Given below are the steps in the preparation of a temporary mount of a stained leaf peel. (I) Cover the two slides with the cover slip. (II) Take two glass slides and transfer the stained peels to them and add a drop of glycerine. (III) Carefully pull out the thin membranous transparent layer from lower and upper epidermis. (IV) Drop peels in the water in a Petri dish and add a drop of Safranin stain.
iii, iv, i, ii
ii, iii, iv, i
iv, ii, i, iii
iii, iv, ii, i
8)
A student focused epidermal peel on both surfaces of leaf under high power (shown below). Calculate the stomatal index of both the surfaces of the leaf and identify the type of plant.
Submerged plants
Dicot plant
Water plants
Monocot plant
