NCERT Exemplar Class 8 Science Chapter 8 Solutions: Cell Structure and Functions
NCERT Exemplar Class 8 Science Solutions Chapter 8 Cell- Structure and Functions are prepared to build a strong base in biological sciences. You will get to learn about the cell and its discovery, different shapes and sizes of cells of different animals. The most interesting topics in this chapter of NCERT Exemplar Class 8 Science are the structure and components of the cell and the functions of these components. In the exemplar problems of this chapter, you will also practice questions on the difference between the plant and animal cells with the help of necessary diagrams.
There are 40 questions compiled together in 1 exercise in Chapter 8. The questions are categorized generously into 4 kinds – very-short answer, short answer, long answer, and very-long answer types questions. This includes true/false, fill in the blanks, match the columns, diagram-based questions, etc. Solving the NCERT Exemplar exercise questions will help you build an aptitude for approaching the solutions quickly.
The team of experts at Instasolv is dedicated to helping you in gaining complete clarity in the concepts of cells. Instasolv is an interactive platform, so you do not have to worry about hustling to different places for NCERT Exemplar solutions for class 8 Science Chapter 8. The solutions to all possible queries have been covered by the experienced faculty of Instasolv.
Important Topics in the NCERT Exemplar Class 8 Science Solutions Chapter 8
Introduction to Cells
The basic structural units of an organism are termed as Cells. These are complex living structures in organisms. The egg of hen is an example of a cell that is also large enough to be seen by an aided eye.
Discovery of the Cell
Robert Hooke discovered the structure of the cell in 1665. He observed a honeycomb structure when he kept a cork (made up of the bark of a tree) under a microscope. The animal cells could only be discovered with a more powerful microscope 150 years later.
Number of Cells in the Organism
- Organisms that are made up of one cell only, are known as unicellular organisms.
- Organisms that are made up of more than one cell, are known as multicellular organisms.
- A human body consists of more than a trillion cells. Different groups of cells perform different tasks to make the body functioning.
- The group of cells from a specialized tissue. These specialized tissues form organs together.
- All the functions such as digestion, excretion, respiration are performed by both the unicellular organism and the multicellular organisms.
Shape and Size of Cells
- Cells can be circular, spherical, long or elongated.
- The long and pointed cells exhibit spindle shape such as the muscle cells.
- Some cells such as the nerve cell are branched.
- The cell membrane that encloses the components of the cell gives shapes to the cells. In the plant cells, a cell wall encloses the cell membrane.
- The size of a cell will depend on the function of the cell.
Parts of the Cells
- Cell Membrane
The main components of a cell, that is, the cytoplasm and the nucleus are enclosed in the cell membrane. This is also known as the plasma membrane and is porous in nature.
The jelly-like substance that fills the space between the cell membrane and the nucleus is known as cytoplasm. It contains other organelles such as mitochondria, etc.
It is separated by a nucleus membrane from the cytoplasm and is spherical in shape. It contains nucleolus, genes, and chromosomes. It also controls all the activities of a cell.
Exercise Discussion of the NCERT Exemplar Class 8 Science Chapter 8
- There are 24 multi-choice questions in the NCERT Exemplar exercise of chapter 8. The MCQs comprise questions related to the components of cells and the identification of the cells and their functions.
- The very short answer type questions will require you to give one-word answers related to unicellular organisms and functions of the cell wall in plant cells.
- The short answer questions are based on labelling exercises of diagrams and reasoning questions. Match the following exercises and classification exercises are also included in this section
- Lastly, there are long answer type questions related to the size of cells, cell wall, and cell organelles.
Why Use NCERT Exemplar Class 8 Science Solutions Chapter 8 by Instasolv?
- Instasolv platform is committed to facilitating your learning process with our experienced faculties.
- We, at Instasolv, have covered each and every question in a detailed and step by step manner in our NCERT Exemplar Class 8 Problems and solutions for science chapter 8.
- It is recommended that you use the Instasolv platform as the source of reference to move ahead with a strong foundation in biology for your higher studies.
- To score well in the exam, you should only look up to NCERT Solutions and NCERT Exemplar Class 8 Science Solutions as they are self-sufficient and cover the entire syllabus of CBSE.