STRUCTURAL ORGANISTION OF PLANTS AND ANIMALS
ANATOMY OF FLOWERING PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A
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B
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C
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D
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Detailed explanation-1: -The correct option is A. Explanation for correct option: Collenchyma cells differ from sclerenchyma in retaining protoplasm at maturity. Sclerenchyma cells do not have protoplasm, while collenchyma cells possess protoplasm at maturity.
Detailed explanation-2: -Collenchyma cells contain protoplasm and do not have any intercellular gaps. Sclerenchyma is made up of dead cells with thick walls. The cells are alive and have protoplasm at first, but as impermeable secondary walls (lignin) form, they become dead, thick, and rigid.
Detailed explanation-3: -If collenchyma is located adjacent to the epidermis, its inner tangential walls may be collenchymatously thickened, or in some cases all epidermal walls may develop thickenings. It is not uncommon to observe one cell layer of collenchyma under the epidermis where only the cell wall facing the epidermis is thickened.
Detailed explanation-4: -The main difference between collenchyma and chlorenchyma is that the collenchyma is a type of simple permanent tissue that provides structural support to the plant whereas the chlorenchyma is a type of modified parenchyma, which is photosynthetic.