Class 11 Biology - BIHAR
Anatomy of Flowering Plants
The chapter 'Anatomy of Flowering Plants' in Class 11 Biology delves into the internal structural organization of higher plants, specifically angiosperms. Students study various plant tissues, including meristematic and permanent tissues, and learn how they are organized into tissue systems like epidermal, ground, and vascular systems. A major focus is placed on the anatomical differences between dicotyledonous and monocotyledonous roots, stems, and leaves through transverse sections. This chapter is vital for Bihar Board (BSEB) examinations as it forms the base for plant physiology and frequently features high-weightage diagram-based questions and structural comparisons.
Start Learning FreeKey Concepts
Meristematic Tissues
Regions of active cell division found in growing parts of the plant, such as root and shoot apices, responsible for primary growth.
Simple Permanent Tissues
Composed of structurally and functionally similar cells that have lost the ability to divide; includes parenchyma, collenchyma, and sclerenchyma.
Complex Permanent Tissues
Transport water, minerals, and organic food across the plant; consists of xylem (water transport) and phloem (food transport).
Epidermal Tissue System
The outermost covering of the entire plant body, consisting of epidermal cells, stomata, and epidermal appendages like trichomes and hairs.
Vascular Tissue System
Comprises complex tissues—xylem and phloem—which together form vascular bundles responsible for internal transport.
Secondary Growth
Increase in girth or diameter of stems and roots due to the activity of lateral meristems like vascular cambium and cork cambium, mainly seen in dicots.
Important Formulas
Board Exam Info
In the Bihar Board (BSEB) Class 11 Biology examination, this chapter typically carries around 6 to 8 marks. Questions frequently include objective multiple-choice questions, short answer questions on differences between dicot and monocot anatomy, and long-answer descriptive questions requiring neat, labeled diagrams of root, stem, or leaf cross-sections.
Frequently Asked Questions
What is the main difference between dicot and monocot stem anatomy?
Dicot stems have ring-arranged vascular bundles with cambium (open), allowing secondary growth, while monocot stems have scattered vascular bundles without cambium (closed).
Why are vascular bundles in dicot roots called radial?
They are called radial because xylem and phloem strands alternate with each other on different radii, unlike conjoint bundles found in stems.
What is the function of the Casparian strip in roots?
The Casparian strip is made of suberin which prevents water and mineral movement through the apoplast pathway, forcing water to enter the symplast through the plasma membrane for selective regulation.
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