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A scientist is studying a newly discovered plant species. Microscopic analysis of the stem reveals living cells with unevenly thickened cell walls, primarily composed of pectin and hemicellulose, providing flexible support. These cells lack lignin and are found in patches beneath the epidermis. Which tissue type is being observed?
Collenchyma
Sclerenchyma
Parenchyma
Xylem
Specialized parenchyma cells containing chloroplasts and found in the mesophyll of leaves are known as:
Aerenchyma
Chlorenchyma
Sclerenchyma
Collenchyma
During secondary growth in dicot roots, which tissue initiates the formation of the vascular cambium?
The innermost layer of the cortex
The pericycle cells opposite to the protoxylem poles
The pith parenchyma cells
Partly from the pericycle and partly from the conjunctive parenchyma cells lying just below the phloem bundles
Which feature distinguishes the conjunctive tissue in a dicot root from the typical parenchyma found in the cortex?
Presence of intercellular spaces
Thin-walled cells with large vacuoles
Sclerenchymatous nature in mature roots providing mechanical support
Abundant chloroplasts for photosynthesis
The large, well-developed pith in a monocot root primarily consists of:
Sclerenchyma cells
Collenchyma cells
Parenchyma cells
Xylem vessels
Which of the following complex tissues provides mechanical strength to the plant, especially in young dicotyledonous stems?
Parenchyma
Sclerenchyma
Xylem
Collenchyma
Which of the following statements is INCORRECT regarding xylem parenchyma?
They store food materials like starch and fats.
They assist in radial conduction of water.
They are primarily responsible for mechanical support.
They aid in lateral conduction of water.
The ground tissue in a monocot stem is often described as 'undifferentiated'. This implies that:
It consists only of parenchyma cells with no other cell types.
It lacks intercellular spaces and is compactly arranged.
The cortex, endodermis, and pericycle are not clearly distinguishable.
It is incapable of further differentiation into specialized tissues.
Which cell type in the ground tissue system is characterized by thin cell walls and large intercellular spaces?
Collenchyma
Sclerenchyma
Parenchyma
Xylem
Which of the following statements regarding the cell wall of parenchyma cells is INCORRECT?
The cell wall of parenchyma cells is primarily composed of cellulose.
The cell wall of parenchyma cells allows for flexibility and expansion.
The cell wall of parenchyma cells is connected to adjacent cells via plasmodesmata.
The cell wall of parenchyma cells is heavily lignified.
