Prepare for NEET Biology Anatomy of Flowering Plants with MCQs & PYQs on NEET.GUIDE. Enjoy free practice, previous year questions, and expert insights on plant tissues and structures.
A unique feature of the quiescent center in root apical meristem is its:
High mitotic activity and contributes to root cap formation
Low mitotic activity and acts as a reserve
High metabolic activity and synthesizes growth hormones
Absence of cell division and undergoes programmed cell death
Which combination of meristems is responsible for producing secondary vascular tissues?
Apical meristem and intercalary meristem
Lateral meristem and apical meristem
Vascular cambium and cork cambium
Intercalary meristem and cork cambium
The pericycle in roots contributes to the formation of which of the following structures, EXCLUDING:
Lateral roots
Vascular cambium
Cork cambium
Root cap
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
Which of the following is NOT a characteristic feature of collenchyma cells?
Presence of lignin in cell walls
Unevenly thickened cell walls
Living cells at maturity
Provides flexible support to the plant
The flexibility of collenchyma tissue is primarily attributed to:
The presence of lignin in the cell wall
The thin cell walls
The combination of pectin and hemicellulose in the cell wall
The intercellular spaces present between the cells
In which specific plant structures would you LEAST expect to find collenchyma tissue?
Beneath the epidermis of young stems
In the petioles of leaves
Supporting the veins of leaves
Mature vascular bundles of woody stems
A mutation in a plant prevents the proper synthesis of pectin. Which tissue would be MOST directly affected by this mutation and what would be the primary consequence?
Sclerenchyma; decreased rigidity in mature tissues
Parenchyma; reduced storage capacity
Collenchyma; reduced flexible support in growing regions
Xylem; impaired water transport
Which statement BEST describes the relationship between collenchyma and sclerenchyma?
Both are composed of living cells at maturity.
Both have evenly thickened cell walls.
Both contain lignin in their cell walls.
Both provide structural support, but collenchyma provides flexible support in growing regions while sclerenchyma provides rigid support in mature regions.
A unique feature of phloem parenchyma is its absence in:
Monocots
Dicots
Gymnosperms
Pteridophytes
