Class 9 Science Chapter 5: The Fundamental Unit of Life Notes and Solutions

HumorousCuboFuturism avatar
HumorousCuboFuturism
·
·
Download

Start Quiz

Study Flashcards

15 Questions

Who discovered the smallest functional unit of life?

Robert Hooke

Which scientist is known for his work on genetics and heredity?

Gregor Mendel

What is the basic unit of life?

Cell

What is the outermost covering of a cell called?

Plasma membrane

What are the two types of cells mentioned in the text?

Plant cell and Animal cell

Which process describes the movement of water from a region of high water concentration to a region of low water concentration through a semi-permeable membrane?

Osmosis

What is the main component of the plant cell wall that provides structural strength?

Cellulose

Which organelle plays a central role in cellular reproduction and contains visible rod-shaped structures called chromosomes?

Nucleus

What is the term for the phenomenon where there is shrinkage or contraction of the contents of a living plant cell away from the cell wall due to loss of water through osmosis?

Plasmolysis

What is the process by which the cell membrane engulfs food and other materials from its external environment, as observed in Amoeba?

Endocytosis

Which of the following substances can move across the cell membrane by a process called osmosis?

Water

In a hypotonic solution, what happens to the cell?

It gains water

What is the main component of the plant cell wall that provides structural strength to plant cells?

Cellulose

What is the term for the phenomenon where there is shrinkage or contraction of the contents of a living plant cell away from the cell wall due to loss of water through osmosis?

Plasmolysis

What are functional segments of DNA called?

Genes

Study Notes

The Fundamental Unit of Life

  • The smallest functional unit of life is a cell, discovered by Robert Hooke in 1665.
  • A cell can independently perform all necessary activities to sustain life, making it the basic unit of life.

Types of Cells

  • There are two main types of cells: plant cells and animal cells.

Cell Organelles and Their Functions

  • Plasma/Cell membrane: the outermost covering of the cell that separates the contents of the cell from its external environment.

Get complete notes for Chapter 5: The Fundamental Unit of Life from the NCERT textbook for Class 9 Science. Enhance your understanding with NCERT Solutions for the same chapter. Perfect for students looking to reinforce their knowledge.

Make Your Own Quizzes and Flashcards

Convert your notes into interactive study material.

Get started for free

More Quizzes Like This

Class 9 Science NCERT Quiz
1 questions
Class 9 NCERT Science Quiz
6 questions
Use Quizgecko on...
Browser
Browser