Chapter 6 of Class 11 Biology is Anatomy of Flowering Plants. It covers the internal structure of plant organs, tissue systems, and the difference between monocot and dicot anatomy. These Class 11 Biology Chapter 6 solutions are also useful as quick revision notes before exams.
Plant Tissues
Meristematic tissue (actively dividing, at apical/lateral/intercalary positions) and permanent tissue (differentiated, no longer dividing). Permanent tissues are simple (parenchyma, collenchyma, sclerenchyma) or complex (xylem, phloem).
Simple Tissues
Parenchyma: living, thin-walled, packing/storage tissue. Collenchyma: living, provides flexible mechanical support (in growing stems/petioles). Sclerenchyma: dead at maturity, thick lignified walls, provides rigid mechanical strength.
Complex Tissues
Xylem: conducts water/minerals, provides mechanical support (tracheids, vessels, xylem fibres, xylem parenchyma). Phloem: conducts food (sieve tubes, companion cells, phloem fibres, phloem parenchyma).
Tissue Systems
Epidermal tissue system (outer protective covering, with stomata and trichomes). Ground tissue system (cortex, endodermis, pericycle, pith). Vascular tissue system (xylem and phloem, arranged in vascular bundles — conjoint, collateral).
Monocot vs Dicot Anatomy
Dicot stems: vascular bundles arranged in a ring, open (with cambium), possible secondary growth. Monocot stems: vascular bundles scattered, closed (no cambium), no secondary growth. Dicot roots: xylem exarch with limited number of xylem arms (typically 2-6). Monocot roots: more numerous xylem arms (polyarch).
Secondary Growth
Increase in girth via lateral meristems: vascular cambium (produces secondary xylem/phloem) and cork cambium/phellogen (produces periderm, replacing epidermis in older stems).
Class 11 Biology Chapter 6 – Notes and Extra Questions
Along with these NCERT Solutions, students can also use the Class 11 Biology Chapter 6 Extra Questions and Class 11 Biology Chapter 6 Revision Notes for quick revision and extra practice.
