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Questions and Answers
Who discovered the smallest functional unit of life?
Which scientist is known for his work on genetics and heredity?
What is the basic unit of life?
What is the outermost covering of a cell called?
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What are the two types of cells mentioned in the text?
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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?
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What is the main component of the plant cell wall that provides structural strength?
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Which organelle plays a central role in cellular reproduction and contains visible rod-shaped structures called chromosomes?
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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?
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What is the process by which the cell membrane engulfs food and other materials from its external environment, as observed in Amoeba?
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Which of the following substances can move across the cell membrane by a process called osmosis?
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In a hypotonic solution, what happens to the cell?
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What is the main component of the plant cell wall that provides structural strength to plant cells?
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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?
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What are functional segments of DNA called?
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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.
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Description
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.
