NCERT Solutions For Class 8 Science Chapter 8: The Class 8 Chapter 8 NCERT Solutions is a relief to all the students who are preparing for their Class 8 exam. Chapter 8 – Cell: Structure and Functions throws light on the structure of the cell and how the size of cells in living organisms may be as small as a millionth of a metre. In order to give you a clear idea on this, students can refer to the revision notes provided in this article. Students will get a clear overview and study notes for Science Chapter 8 from these notes.
After you finish reading the notes, you will also find the NCERT Solutions for Chapter- Cell: Structure and Functions in this article. These solutions have been prepared by experts at Embibe. The solutions for NCERT Class 8 Science Chapter 8 will aid you in revising the chapter quickly with clarity on the chapter. Do not forget to practice free online mock tests from the links given in this articles. These tests will increase your speed of attempting the questions and also boost your confidence.
NCERT Solutions For Class 8 Science Chapter 8
Prior to getting into the detailed NCERT Solutions for Class 8 Science Chapter 8, it is important for you to have good knowledge on the list of topics and sub-topics in this chapter- Cell: Structure and Functions. Glance below to have an idea on the number of topics in chapter 8:
|8.1||Discovery of the Cell|
|8.3||Organisms show Variety in Cell Number, Shape, and Size|
|8.4||Cell Structure and Function|
|8.5||Parts of the Cell|
|8.6||Comparison of Plant and Animal Cells|
NCERT Solutions For Class 8 Science Chapter 8 PDF Download
Students can download the Class 8 Science Cell: Structure and Functions PDF from this write-up. Having knowledge of the Cells and Nucleus is essential for you. As you solve the questions of Class 8 Science Chapter 8 NCERT book, you will get to know more about the different types of cells as well as its different parts.
Class 8 Science Chapter 8 – Cell: Structure and Functions Notes
Let us have a revision of Class 8 Science Chapter 8- Cell: Structure and Functions here. These science revision notes will help you with last minute revision.
What is a cell?
It is a basic structural unit of an organ. They are assembled to make the body of every organism.
Robert Hooke discovered cell in 1665 by observing thin slices of cork under a microscope.
Human body has trillions of cells which vary in shape and size. Different groups of cells perform a variety of functions.
Difference between Unicellular and Multicellular Organisms.
|Unicellular Organism||Multicellular Organism|
|Organisms made up of a single cell are called unicellular organism.||Organisms made of more than one cell are called multicellular organisms.|
|They are irregular in shape.||They have a definite shape.|
|A single cell is responsible to carry out all the functions of the body.||Multiple cells carry out different functions of the body.|
|Example: Amoeba, paramecium, Bacteria, yeast, fungi||Example: Human, animals, birds, plants, insects|
Shape of Cells:
In unicellular organism like amoeba, cells have no definite shape. It keeps on changing its shape. Some projections of varying length protrude out of its body. These are called pseudopodia or false feet.
However in multicellular organisms, cells can have the following shapes
- – Round or spherical: like red blood cells of humans
- – Long and pointed at both ends, i.e. spindle shaped: like muscle cells
- – Long and branched: like nerve cell or neuron
What are the different functions of cell?
Cells performing similar kind of functions combine together to form tissues. And tissues further forms an organ.
Each organ in the system performs different functions such as digestion, assimilation and absorption.
Parts of the Cell:
Basic components of a cell are cell membrane, cytoplasm and nucleus. All the parts of the cell are described as follows:
- – Cytoplasm and nucleus are enclosed inside cell membrane.
- – It is also known as plasma membrane.
- – The membrane separates cells from one another.
- – It gives shape to the cell.
- – The plasma membrane is porous and allows the movement of substances both inward and outward.
- – It is present at the centre of cell membrane.
- – It is dense and round in shape.
- – Nucleus is separated from cytoplasm by a membrane called nuclear membrane.
- – Nuclear membrane is porous and allows movement of material between the cytoplasm and inside of the nucleus.
- – Nucleus also contains thread-like structures called chromosomes. They carry genes and help in inheritance or transfer of characters from the parents to the offspring.
- – Nucleus also acts a control centre of activities of the cell.
Cytoplasm: It is a jelly like substance present between the nucleus and the cell membrane.
Cell wall: It is the additional outer thick layer in the cells of plants.
Difference between Prokaryotic and Eukaryotic Cell
|Prokaryotic Cell||Eukaryotic Cell|
|Nucleus is not well organised.||They have well organised nucleus.|
|Nuclear membrane is absent.||Nuclear membrane is present.|
|Organisms with these kind of cells are called prokaryotes.||Organisms with these kind of cells are called eukaryotes.|
|For example: bacteria and blue green algae||For example: human cell (all organisms other than bacteria and blue green algae are eukaryotes)|
- – They are bubble-like structure found inside the cell.
- – Plant cell have large vacuole whereas animal cell have a very small vacuole.
- – It stores food and a variety of nutrients that a cell might need to survive.
- – They might also store waste products to protect the other cells from contamination.
- – Coloured bodies called plastids are present only in the plant cells.
- – Some plastids contain a green coloured pigment called chlorophyll.
- – They are responsible for the green colour of the plants.
Chloroplasts: Green coloured plastids are known as chloroplasts.
This completes the revision notes of the Chapter- Cell: Structure and Functions. Students are advised to attempt all the questions from their NCERT Book. It will help you in testing your understanding for this chapter and also help in better exam preparation. To help you with the solutions, students can either refer to the images given in this page or click here to download Science Chapter 8 solutions PDF.
|NCERT Solutions for Class 8 Science Chapter 7||NCERT Solutions for Class 8 Science Chapter 9||NCERT Solutions for Class 8 Science (All Chapter)|
This article on CBSE NCERT Solutions for Class 8 Science Chapter 8 – Cells: Structure and Functions will assist you in clearing your doubts that might come across your mind when preparing for the exam. Its is advisable for you to stay away from rote learning. NCERT Solutions for Class 8 Chapter 8 will help you in absorbing the chapter better. Also, solving the solution will aid you in understanding the paper pattern as well as help you manage your speed and time. Make the best use of the NCERT Solutions for Class 8 Science Chapter 8 so as to score well in the exam. You can also take free Class 8 Science Chapter-wise Test on Embibe to shape up your preparation for the examination.
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