2
Question
Read the following statements:
I) Collenchyma contains lignin in its wall thickenings
II) Collenchyma is found only in aerial primary parts and is absent from the roots
III) Chlorenchyma is parenchyma or collenchyma with chloroplasts in them
IV) Collenchyma does not have intercellular spaces
Which of the following combinations are correct?
Read the following statements:
I) Collenchyma contains lignin in its wall thickenings
II) Collenchyma is found only in aerial primary parts and is absent from the roots
III) Chlorenchyma is parenchyma or collenchyma with chloroplasts in them
IV) Collenchyma does not have intercellular spaces
Which of the following combinations are correct?
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Solution
The correct option is B II, III and IV only
Collenchyma is an example of a simple permanent living mechanical tissue. The cell wall is made of cellulose, hemicellulose and pectin.
The cells are varied in shapes and there are no intercellular spaces as they are filled up with pectin.
Collenchyma is found in the aerial primary parts such as leaf margins and young stems of dicot plants.
They are absent in the roots except in aerial roots of some plants.
When chloroplasts are present in the cells, the tissue is referred to as chlorenchyma. This helps in photosynthesis due to the presence of chloroplasts in them.
Collenchyma is an example of a simple permanent living mechanical tissue. The cell wall is made of cellulose, hemicellulose and pectin.
The cells are varied in shapes and there are no intercellular spaces as they are filled up with pectin.
Collenchyma is found in the aerial primary parts such as leaf margins and young stems of dicot plants.
They are absent in the roots except in aerial roots of some plants.
When chloroplasts are present in the cells, the tissue is referred to as chlorenchyma. This helps in photosynthesis due to the presence of chloroplasts in them.
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