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Chapter Summary

External Morphology - Plants

Telangana Open School (TOSS) · Class 12 · Biology

Summary of External Morphology - Plants for Telangana Open School (TOSS) Class 12 Biology. Key concepts, important points, and chapter overview.

53 questions25 flashcards5 concepts

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Overview

The external morphology of plants refers to the study of the shape, structure, and function of various external parts of a plant. In flowering plants, the body is divided into two main systems: the root system and the shoot system. The root system lies underground and anchors the plant, while the sh

Key Concepts

The root is the underground part

The root is the underground part of the plant that develops from the radicle. It has four regions: meristematic zone (cell division), elongation zone

The stem is the aerial part

The stem is the aerial part that develops from the plumule. It bears leaves, flowers, and fruits. It can be modified for food storage (e.g., potato, g

Leaves are lateral

Leaves are lateral, green, photosynthetic organs. A typical leaf has a leaf base, petiole, and lamina. Venation is either reticulate (dicots) or paral

Inflorescence is the arrangement of flowers

Inflorescence is the arrangement of flowers on the stem. It can be racemose (acropetal), cymose (basipetal), or special. A flower has four whorls: cal

Placentation refers to the arrangement

Placentation refers to the arrangement of ovules inside the ovary. Types include marginal (pea), axile (hibiscus), parietal (mustard), free central (p

Learning Objectives

  • Define and identify root and its regions
  • Distinguish between tap and adventitious root systems
  • Describe modifications of roots, stems, and leaves
  • Explain the structure and functions of the stem and leaf
  • Understand phyllotaxy and types of venation

Frequently Asked Questions

What are the important topics in External Morphology - Plants for Telangana Open School (TOSS) Class 12 Biology?
External Morphology - Plants covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in External Morphology - Plants — Telangana Open School (TOSS) Class 12 Biology?
Understand the core concepts first, then work through the 53 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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