CBSE Class 9 Science Chapter 6 Tissues NCERT Solutions

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NCERT Solutions PDF Class 9 PDF

This comprehensive set of NCERT Solutions for CBSE Class 9 Science, Chapter 6: Tissues, provides clear and detailed explanations for in-text questions. The chapter delves into the fundamental concepts of tissues, exploring their definition, utility in multicellular organisms, and the different types found in plants. It covers simple permanent tissues like parenchyma, collenchyma, and sclerenchyma, along with complex tissues such as xylem and phloem. The solutions also touch upon animal tissues, including epithelial, connective, muscular, and nervous tissues. This resource is designed to help students grasp the intricate details of tissue organization and function, aiding in effective exam preparation and a deeper understanding of biological structures.

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Quick info

BoardCBSE
ClassClass 9
SubjectScience
Session2026
LanguageEnglish
TypeNCERT Solutions
ChapterChapter 6

Chapter summary

Chapter 6, Tissues, for Class 9 Science NCERT Solutions focuses on the basic unit of organization in multicellular organisms. It defines tissues, explains their importance through the concept of division of labor, and differentiates between plant and animal tissues. The solutions cover simple and complex permanent tissues in plants, including their types and functions, and introduce the four main types of animal tissues: epithelial, connective, muscular, and nervous tissues. This chapter is crucial for understanding the structural basis of life.

Learning outcomes

  • Define the term 'tissue' and its role in multicellular organisms.
  • Identify and differentiate between simple and complex permanent tissues in plants.
  • Understand the structure and function of various plant tissues like parenchyma, collenchyma, sclerenchyma, xylem, and phloem.
  • Recognize the four main types of animal tissues: epithelial, connective, muscular, and nervous.
  • Explain the concept of division of labor in multicellular organisms.

Topics covered

Paper topics

  • Definition of Tissue
  • Utility of Tissues in Multicellular Organisms
  • Division of Labor
  • Plant Tissues
  • Meristematic Tissue
  • Apical Meristem
  • Simple Permanent Tissues
  • Parenchyma
  • Collenchyma
  • Sclerenchyma
  • Complex Permanent Tissues
  • Phloem

Important topics

  • Definition and Utility of Tissues
  • Simple Permanent Tissues (Parenchyma, Collenchyma, Sclerenchyma)
  • Sclerenchyma (Husk of Coconut)
  • Complex Permanent Tissue (Phloem)
  • Apical Meristem Function

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Questions and Solutions

Question 1

What is a tissue?
Solution: A tissue is defined as a group of cells that are structurally similar and are organized together to carry out a specific function or task within a multicellular organism. These specialized groups of cells enable a division of labor, leading to greater efficiency in biological processes.

Question 2

What is the utility of tissues in multi-cellular organisms?
Solution: In multicellular organisms, tissues are essential for efficient functioning through the principle of division of labor. Unlike unicellular organisms where a single cell performs all life functions (like respiration, movement, excretion, and digestion), multicellular organisms have specialized tissues. Each tissue is dedicated to performing a particular function at a specific location in the body. For instance, muscle cells form muscular tissues responsible for movement, and nerve cells form nervous tissue for transmitting messages. This specialization allows multicellular organisms to perform complex functions with high efficiency and complexity.

Question 1

Name the types of simple tissues found in plants.
Solution: The simple permanent tissues in plants are classified into three main types:
  1. Parenchyma
  2. Collenchyma
  3. Sclerenchyma
Furthermore, the parenchyma tissue can be further specialized into two types: aerenchyma (which contains large air spaces for buoyancy in aquatic plants) and chlorenchyma (which contains chloroplasts for photosynthesis).

Question 2

Where is apical meristem found in plants?
Solution: Apical meristem is a type of actively dividing plant tissue located at the growing tips of both the shoot (stem and leaves) and the root. Its primary role is to initiate growth by producing new cells at these extremities, thereby increasing the length of the plant.

Question 3

Which tissue makes up the husk of a coconut?
Solution: The husk of a coconut is primarily made up of sclerenchyma tissue. This tissue consists of cells with thick, lignified walls, providing strength, rigidity, and toughness, which are characteristic features of the coconut husk.

Question 4

What are the constituents of phloem?
Solution: Phloem is a complex permanent tissue in plants responsible for the translocation of food (sugars produced during photosynthesis) from the leaves to other parts of the plant. It is composed of four types of elements:
  1. Sieve tubes: These are elongated, tubular cells that facilitate the transport of food.
  2. Companion cells: These cells are closely associated with sieve tubes and play a role in loading and unloading sugars.
  3. Phloem parenchyma: These cells store food materials and help in lateral transport.
  4. Phloem fibres: These provide mechanical support to the phloem tissue.

Common mistakes

  • Confusing simple and complex plant tissues.
  • Misidentifying the specific tissue responsible for a particular function (e.g., husk of coconut).
  • Not fully listing all components of complex tissues like phloem.
  • Incomplete understanding of the role of meristematic tissues.

Revision tips

  • Draw diagrams for each type of tissue discussed to visualize their structure.
  • Create a table comparing and contrasting different plant and animal tissues.
  • Focus on understanding the 'why' behind tissue specialization and division of labor.
  • Review the functions of each tissue type and relate them to specific examples in plants and animals.

Practice MCQs

Q1. What is the primary characteristic of cells within a tissue?

Q2. Which type of simple permanent tissue is primarily responsible for providing mechanical support and flexibility to plant parts?

Q3. The husk of a coconut is primarily composed of which type of tissue?

Q4. Which of the following is NOT a constituent of phloem?

Q5. What is the main function of apical meristem?

Frequently asked questions

What is a tissue in biology?

A tissue is a group of similar cells, along with their intercellular substances, that are organized together to perform a specific function in a multicellular organism.

Why are tissues important in multicellular organisms?

Tissues are important because they allow for a division of labor, where specialized tissues perform specific functions efficiently, leading to better overall functioning of the organism.

What are the main types of simple permanent tissues in plants?

The main types of simple permanent tissues in plants are Parenchyma, Collenchyma, and Sclerenchyma.

Where is apical meristem found and what is its function?

Apical meristem is found at the growing tips of stems and roots. Its function is to increase the length of the plant by producing new cells.

Which tissue makes up the husk of a coconut?

The husk of a coconut is made up of sclerenchyma tissue, which provides strength and toughness.

What are the four components of phloem?

The four components of phloem are sieve tubes, companion cells, phloem parenchyma, and phloem fibres.

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