A group of PUC students are appearing for a biology practical examination. One of the practical problems is to identify the slide focused under a microscope. When they observe, they see a structure more or less spherical having an outer most layer which is green in colour and in the middle many of parenchyma cells and a number of skull-shaped bundles are arranged irregularly all around. Help them in identifying the structure properly.
It is the transverse section of a dicot stem.
It is the transverse section of a monocot root.
It is the transverse section of a dicot leaf.
Both B and C
A
It is the transverse section of a monocot root.
B
Both B and C
C
It is the transverse section of a dicot stem.
D
It is the transverse section of a dicot leaf.
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Solution
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Monocots have their vascular bundles arranged in the form of a ring. They have spherical structures when seen in a microscope. In their outermost layer, there is a presence of chloroplast containing chlorophyll. Both of them have these layers of epidermis, cortex, endodermis, pericycle, vascular tissue, conjunctive tissue, pith. In the middle layer, there are parenchyma cells. Below it, there are skull-shaped bundles of xylem and phloem arranges spherically.
So, option D is the correct answer.
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A group of PUC students are appearing for a biology practical examination. One of the practical problems is to identify the slide focused under a microscope. When they observe, they see a structure more or less spherical having an outer most layer which is green in colour and in the middle many of parenchyma cells and a number of skull-shaped bundles are arranged irregularly all around. Help them in identifying the structure properly.
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Q3
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