Gr 9 NATURAL SCIENCES: 1.1 Cells in tissues, organs and systems

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What is the primary purpose of using a microscope?

To observe objects that are too large to be seen with the naked eye

To weigh very small objects

To understand the structure and function of cells (correct)

To dissect very small organisms

What type of microscope uses electrons instead of light to observe very fine details?

Compound Microscope

Wet Mount Microscope

Electron Microscope (correct)

Light Microscope

What is the function of the eyepiece in a light microscope?

To illuminate the specimen

To focus the image

To hold the slide in place

To magnify the image (correct)

What is the purpose of the diaphragm in a light microscope?

To control the amount of light reaching the specimen Signup and view all the answers

Why is it important to clean the lenses of a microscope with proper lens paper?

To avoid damaging the lenses Signup and view all the answers

What is the purpose of the coarse and fine focus knobs in a light microscope?

To adjust the focus of the image Signup and view all the answers

What type of microscope is suitable for viewing live cells and tissues?

Light Microscope Signup and view all the answers

What is the purpose of a wet mount in preparing a specimen for microscopic observation?

To observe living organisms and aquatic samples Signup and view all the answers

Why is it important to store a microscope with the lowest objective lens in place?

To prevent dust accumulation Signup and view all the answers

What is the main purpose of staining in microscopy?

To enhance contrast and allow for better visualization of structures Signup and view all the answers

What is the term for the process by which cells become specialized to perform distinct functions?

Differentiation Signup and view all the answers

What type of stem cells can become any cell type in the body?

Embryonic stem cells Signup and view all the answers

What is the term for organisms that consist of a single cell that performs all life functions?

Unicellular organisms Signup and view all the answers

What is the hierarchy of organization in multicellular organisms?

Cells, tissues, organs, systems, organism Signup and view all the answers

What type of mount is used for observing hair, feathers, pollen grains, or dust?

Dry mount Signup and view all the answers

What is the purpose of the coarse focus knob in a microscope?

To bring the specimen into general focus Signup and view all the answers

What type of cells are flat and cover surfaces?

Epithelial cells Signup and view all the answers

What is the term for the process of spreading a sample thinly across a slide and allowing it to dry?

Smear Signup and view all the answers

What is the function of epithelial tissue in the digestive system?

To protect the body and cover surfaces Signup and view all the answers

What is the primary function of epithelial cells in the body?

To protect the body by covering surfaces Signup and view all the answers

What is the purpose of a smear in preparing a specimen for microscopic observation?

To spread a sample thinly across a slide and allow it to dry Signup and view all the answers

What is the main difference between embryonic stem cells and adult stem cells?

Embryonic stem cells can become any cell type in the body, while adult stem cells are more limited in their differentiation potential Signup and view all the answers

What is the term for the organization of cells that specialize and work together to perform a specific function?

Tissue Signup and view all the answers

What is the purpose of using a dry mount in preparing a specimen for microscopic observation?

To observe hair, feathers, pollen grains, or dust Signup and view all the answers

What is the term for the process by which cells become specialized to perform distinct functions?

Differentiation Signup and view all the answers

What is the purpose of using a cover slip when preparing a specimen for microscopic observation?

To avoid air bubbles and allow for clear observation Signup and view all the answers

What is the term for organisms that consist of many cells that specialize and work together?

Multicellular organisms Signup and view all the answers

What is the purpose of using staining in microscopy?

To enhance contrast and allow for better visualization of structures Signup and view all the answers

What is the term for the basic unit of life in multicellular organisms?

Cell Signup and view all the answers

What is the main advantage of using an electron microscope over a light microscope?

It provides higher magnification and resolution Signup and view all the answers

What is the purpose of the objective lenses in a light microscope?

To magnify the image Signup and view all the answers

Why is it important to use a stable, flat surface when placing a microscope?

To prevent damage to the microscope Signup and view all the answers

What is the purpose of a wet mount in preparing a specimen for microscopic observation?

To view living organisms and aquatic samples Signup and view all the answers

Why is it important to handle cover slips by the edges?

To prevent fingerprints on the cover slip Signup and view all the answers

What is the main difference between a light microscope and an electron microscope?

The source of illumination Signup and view all the answers

What is the purpose of the stage in a light microscope?

To provide a stable platform for the slide Signup and view all the answers

Why is it important to focus smoothly and slowly when using a microscope?

To prevent damage to the lenses Signup and view all the answers

What is the main advantage of using a light microscope over an electron microscope?

It can view live cells and tissues Signup and view all the answers

Why is it important to carry a microscope with one hand supporting the base and the other holding the arm?

To prevent damage to the microscope Signup and view all the answers

What is the primary function of the objective lenses in a light microscope?

To magnify the image Signup and view all the answers

Why is it important to use a cover slip when preparing a specimen for microscopic observation?

To prevent the specimen from drying out Signup and view all the answers

What is the main advantage of using an electron microscope over a light microscope?

Higher resolution Signup and view all the answers

Why is it important to handle microscope slides with care?

To prevent breakage of the slide Signup and view all the answers

What is the main function of the diaphragm in a light microscope?

To control the amount of light reaching the specimen Signup and view all the answers

Why is it important to clean the microscope lenses?

To prevent damage to the microscope Signup and view all the answers

What is the primary function of the coarse focus knob in a microscope?

To rapidly bring the image into focus Signup and view all the answers

Why is it important to store a microscope with the lowest objective lens in place?

To prevent damage to the microscope Signup and view all the answers

What is the main advantage of using a wet mount over a dry mount in preparing a specimen for microscopic observation?

It prevents the formation of air bubbles Signup and view all the answers

What is the main purpose of a wet mount in preparing a specimen for microscopic observation?

To observe living organisms and aquatic samples Signup and view all the answers

What is the term for the process of cell specialization that enables multicellular organisms to perform complex functions?

Differentiation Signup and view all the answers

Why is it important to carry a microscope with one hand supporting the base and the other holding the arm?

To prevent damage to the microscope Signup and view all the answers

Which type of stem cell has a limited differentiation potential and is essential for tissue maintenance and repair?

Adult stem cell Signup and view all the answers

What is the main function of epithelial cells in multicellular organisms?

To protect the body and cover surfaces Signup and view all the answers

What is the term for the organization of cells that work together to perform a specific function?

Tissue Signup and view all the answers

What is the purpose of using a smear in preparing a specimen for microscopic observation?

To spread the sample thinly across the slide and allow it to dry Signup and view all the answers

What is the term for the basic unit of life in unicellular organisms?

Cell Signup and view all the answers

What is the purpose of using staining in microscopy?

To enhance the contrast of the specimen and allow for better visualization of structures Signup and view all the answers

What is the term for the organization of cells, tissues, organs, and systems that work together to perform complex functions?

Multicellular organisms Signup and view all the answers

What is the main difference between unicellular and multicellular organisms?

The number of cells Signup and view all the answers

Gr 9 NATURAL SCIENCES: 1.1 Cells in tissues, organs and systems

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Questions and Answers

What is the primary purpose of using a microscope?

What type of microscope uses electrons instead of light to observe very fine details?

What is the function of the eyepiece in a light microscope?

What is the purpose of the diaphragm in a light microscope?

Why is it important to clean the lenses of a microscope with proper lens paper?

What is the purpose of the coarse and fine focus knobs in a light microscope?

What type of microscope is suitable for viewing live cells and tissues?

What is the purpose of a wet mount in preparing a specimen for microscopic observation?

Why is it important to store a microscope with the lowest objective lens in place?

What is the main purpose of staining in microscopy?

What is the term for the process by which cells become specialized to perform distinct functions?

What type of stem cells can become any cell type in the body?

What is the term for organisms that consist of a single cell that performs all life functions?

What is the hierarchy of organization in multicellular organisms?

What type of mount is used for observing hair, feathers, pollen grains, or dust?

What is the purpose of the coarse focus knob in a microscope?

What type of cells are flat and cover surfaces?

What is the term for the process of spreading a sample thinly across a slide and allowing it to dry?

What is the function of epithelial tissue in the digestive system?

What is the primary function of epithelial cells in the body?

What is the purpose of a smear in preparing a specimen for microscopic observation?

What is the main difference between embryonic stem cells and adult stem cells?

What is the term for the organization of cells that specialize and work together to perform a specific function?

What is the purpose of using a dry mount in preparing a specimen for microscopic observation?

What is the term for the process by which cells become specialized to perform distinct functions?

What is the purpose of using a cover slip when preparing a specimen for microscopic observation?

What is the term for organisms that consist of many cells that specialize and work together?

What is the purpose of using staining in microscopy?

What is the term for the basic unit of life in multicellular organisms?

What is the main advantage of using an electron microscope over a light microscope?

What is the purpose of the objective lenses in a light microscope?

Why is it important to use a stable, flat surface when placing a microscope?

What is the purpose of a wet mount in preparing a specimen for microscopic observation?

Why is it important to handle cover slips by the edges?

What is the main difference between a light microscope and an electron microscope?

What is the purpose of the stage in a light microscope?

Why is it important to focus smoothly and slowly when using a microscope?

What is the main advantage of using a light microscope over an electron microscope?

Why is it important to carry a microscope with one hand supporting the base and the other holding the arm?

What is the primary function of the objective lenses in a light microscope?

Why is it important to use a cover slip when preparing a specimen for microscopic observation?

What is the main advantage of using an electron microscope over a light microscope?

Why is it important to handle microscope slides with care?

What is the main function of the diaphragm in a light microscope?

Why is it important to clean the microscope lenses?

What is the primary function of the coarse focus knob in a microscope?

Why is it important to store a microscope with the lowest objective lens in place?

What is the main advantage of using a wet mount over a dry mount in preparing a specimen for microscopic observation?

What is the main purpose of a wet mount in preparing a specimen for microscopic observation?

What is the term for the process of cell specialization that enables multicellular organisms to perform complex functions?

Why is it important to carry a microscope with one hand supporting the base and the other holding the arm?

Which type of stem cell has a limited differentiation potential and is essential for tissue maintenance and repair?

What is the main function of epithelial cells in multicellular organisms?

What is the term for the organization of cells that work together to perform a specific function?

What is the purpose of using a smear in preparing a specimen for microscopic observation?

What is the term for the basic unit of life in unicellular organisms?

What is the purpose of using staining in microscopy?

What is the term for the organization of cells, tissues, organs, and systems that work together to perform complex functions?

What is the main difference between unicellular and multicellular organisms?

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