Anatomy of Flowering Plants – NEET 2025 Notes | Class 11 Biology Chapter 6 | Diagrams + Summary + PYQs

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🪴 Blog Structure

🌸 1. Introduction

Hello NEET aspirants 👋

In this chapter, we’ll explore the internal structure of plants — tissues, vascular systems, and secondary growth.

It’s a visual chapter where diagrams matter more than definitions — so let’s make it simple, smart, and memorable.

🌿 2. Plant Tissues Overview

Two main types of tissues:

1. Meristematic Tissues:

Actively dividing cells.

Types:

Apical Meristem: At shoot and root tips (growth in length).

Intercalary Meristem: At base of nodes (grass).

Lateral Meristem: Cambium (growth in thickness).

2. Permanent Tissues:

Differentiated, non-dividing cells.

Types:

Simple: Parenchyma, Collenchyma, Sclerenchyma.

Complex: Xylem (water transport) and Phloem (food transport).

🧠 Mnemonic: “Please Come Study Xtra Power” → Parenchyma, Collenchyma, Sclerenchyma, Xylem, Phloem.

🌾 3. Xylem and Phloem Comparison

Feature Xylem Phloem

Function Water transport Food transport

Direction Upward only Up & down

Living/Dead Mostly dead Mostly living

Main Elements Tracheids, Vessels Sieve tubes, Companion cells

🧠 Tip: Remember “X” → dead (cross mark), “Ph” → photo (life).

🌱 4. Anatomy of Dicot & Monocot Stem

Feature Dicot Stem Monocot Stem

Vascular Bundles Few, in ring Many, scattered

Secondary Growth Present Absent

Example Sunflower Maize

🌿 5. Anatomy of Dicot & Monocot Root

Feature Dicot Root Monocot Root

Vascular Bundles 2–6 (Radial) 8 or more

Pith Small Large

Secondary Growth Present Absent

Example Bean Maize

🌳 6. Secondary Growth

Occurs due to cambium activity:

Vascular cambium → secondary xylem & phloem.

Cork cambium → periderm formation (outer bark).

Annual rings show tree age.

🧠 Mnemonic: “Cork Creates Cover” 🌲

📘 7. PYQs

Q1. Secondary growth occurs in —

✅ Dicot stem only

Q2. Dead elements of xylem —

✅ Tracheids, Vessels, Fibres.

Q3. Companion cells are associated with —

✅ Sieve tube elements.

🌟 8. Summary Points

Tissues form the internal architecture.

Meristematic → growth; Permanent → support/transport.

Secondary growth = cambium activity.

Dicot = ringed bundles; Monocot = scattered bundles.

💚 9. Motivation Corner

“Even trees grow stronger from the inside — the deeper the anatomy, the greater the strength.”