Gr 9 NATURAL SCIENCES: CH 1.1 SUM Cells as basic units of life
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Questions and Answers

What is the primary function of the diaphragm in a microscope?

  • To adjust the focus of the image
  • To carry the microscope with one hand
  • To control the amount of light reaching the specimen (correct)
  • To clean the lenses with proper lens paper

    • What type of mount is used for observing living organisms and aquatic samples?

  • Staining
  • Smear
  • Wet mount (correct)
  • Dry mount

    • What is the term for the process by which cells specialize to perform distinct functions?

  • Organization
  • Differentiation (correct)
  • Specialization
  • Stem cell formation

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

    <p>Embryonic stem cells</p> Signup and view all the answers

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

    <p>Multicellular organisms</p> Signup and view all the answers

    What is the primary function of the stage in a microscope?

    <p>To place the slide</p> Signup and view all the answers

    What type of cells are found in tissues like bone marrow and are essential for tissue maintenance and repair?

    <p>Adult stem cells</p> Signup and view all the answers

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

    <p>Dry mount</p> Signup and view all the answers

    What is the term for the process of preparing specimens for microscopic observation?

    <p>Mounting</p> Signup and view all the answers

    What is the basic unit of life in multicellular organisms?

    <p>Cells</p> Signup and view all the answers

    What is the main function of the stroma in a plant cell?

    <p>Converting carbon dioxide into glucose</p> Signup and view all the answers

    What is the function of chlorophyll in a plant cell?

    <p>Capturing light energy</p> Signup and view all the answers

    What is the main function of vacuoles in a plant cell?

    <p>Storing nutrients</p> Signup and view all the answers

    What is the primary component of the plant cell wall?

    <p>Cellulose</p> Signup and view all the answers

    What is the function of the cell wall in plant cells?

    <p>To provide structural support and protection</p> Signup and view all the answers

    What is the term for the solution of water, enzymes, ions, salts, and other substances found in the central vacuole?

    <p>Cell sap</p> Signup and view all the answers

    What organelles are responsible for photosynthesis in plant cells?

    <p>Chloroplasts</p> Signup and view all the answers

    What is the primary function of plasmodesmata in plant cells?

    <p>Communication and transport between adjacent plant cells</p> Signup and view all the answers

    What is the function of chlorophyll in chloroplasts?

    <p>To absorb light energy</p> Signup and view all the answers

    Which organelle is responsible for breaking down cellular waste and debris in animal cells?

    <p>Lysosome</p> Signup and view all the answers

    What is the structure within chloroplasts where light-dependent reactions occur?

    <p>Thylakoids</p> Signup and view all the answers

    What is the primary function of centrioles in animal cells?

    <p>Organizing the mitotic spindle during cell division</p> Signup and view all the answers

    What is the primary energy storage form in plant cells?

    <p>Starch</p> Signup and view all the answers

    What is the name of the pigment that absorbs light energy in chloroplasts?

    <p>Chlorophyll</p> Signup and view all the answers

    What is the main difference between plant and animal cells?

    <p>Plant cells have a cell wall, while animal cells do not</p> Signup and view all the answers

    What is the primary function of the eyepiece (ocular lens) in a light microscope?

    <p>Typically magnifies 10x</p> Signup and view all the answers

    What is the primary difference between light microscopes and electron microscopes?

    <p>Electron microscopes are more powerful</p> Signup and view all the answers

    Which of the following organisms have cell walls?

    <p>Plants, bacteria, and fungi</p> Signup and view all the answers

    What is the function of grana in chloroplasts?

    <p>To increase the surface area for light-dependent reactions</p> Signup and view all the answers

    What is the purpose of the cell wall in regulating the entry and exit of substances?

    <p>To work in conjunction with the cell membrane to control the internal environment</p> Signup and view all the answers

    What is an organism?

    <p>A complete living entity capable of performing all life processes</p> Signup and view all the answers

    What is the function of the coarse focus knob on a microscope?

    <p>To bring the specimen into general focus</p> Signup and view all the answers

    What is the purpose of labeling the different structures and organelles when observing cells under a microscope?

    <p>To make detailed drawings of the observed cells</p> Signup and view all the answers

    What is the first step in preparing a microscope for observation?

    <p>Ensure the microscope is clean and properly set up</p> Signup and view all the answers

    What is the term for a group of organs that work together to perform complex functions?

    <p>Organ system</p> Signup and view all the answers

    What is the purpose of using a cover slip when preparing a slide for microscopy?

    <p>To avoid air bubbles</p> Signup and view all the answers

    What is the term for the basic structural unit of an organism?

    <p>Cell</p> Signup and view all the answers

    What is the purpose of observing cells under a microscope?

    <p>To understand the complexity and efficiency of living organisms</p> Signup and view all the answers

    What is the term for a type of tissue found in the digestive system?

    <p>Epithelial tissue</p> Signup and view all the answers

    What is the purpose of the fine focus knob on a microscope?

    <p>To sharpen the image of the specimen</p> Signup and view all the answers

    What is the primary component of the plant cell wall that provides rigidity and strength?

    <p>Cellulose</p> Signup and view all the answers

    What is the function of thylakoids in chloroplasts?

    <p>Light-dependent reactions of photosynthesis</p> Signup and view all the answers

    Which organelles are responsible for regulating the entry and exit of substances in plant cells?

    <p>Cell membrane and cell wall</p> Signup and view all the answers

    What is the purpose of the cell wall in plant cells?

    <p>To provide structural support and protection</p> Signup and view all the answers

    What is the function of chlorophyll in chloroplasts?

    <p>To absorb light energy</p> Signup and view all the answers

    Which of the following cells have cell walls?

    <p>Only plant cells</p> Signup and view all the answers

    What is the function of grana in chloroplasts?

    <p>To regulate light-dependent reactions</p> Signup and view all the answers

    What is the main difference between plant and animal cells?

    <p>Plant cells have cell walls, while animal cells do not</p> Signup and view all the answers

    What is the purpose of chloroplasts in plant cells?

    <p>To convert light energy into chemical energy</p> Signup and view all the answers

    What is the function of the cell wall in providing structural support to plant cells?

    <p>It maintains cell shape and provides rigidity</p> Signup and view all the answers

    What is the main function of the stroma in a plant cell?

    <p>To convert carbon dioxide into glucose</p> Signup and view all the answers

    What is the primary function of vacuoles in plant cells?

    <p>To store nutrients and waste products</p> Signup and view all the answers

    What is the main difference between light microscopes and electron microscopes?

    <p>Light microscopes have lower magnification, while electron microscopes have higher magnification</p> Signup and view all the answers

    Which organelle is responsible for breaking down waste materials in plant cells?

    <p>Vacuoles</p> Signup and view all the answers

    What is the primary function of centrioles in animal cells?

    <p>To organize the mitotic spindle during cell division</p> Signup and view all the answers

    What is the primary component of the plant cell wall?

    <p>Cellulose</p> Signup and view all the answers

    What is the function of plasmodesmata in plant cells?

    <p>To allow communication and transport between adjacent plant cells</p> Signup and view all the answers

    What is the primary energy storage form in animal cells?

    <p>Glycogen</p> Signup and view all the answers

    What is the main function of the eyepiece (ocular lens) in a light microscope?

    <p>To magnify the image</p> Signup and view all the answers

    What is the primary function of peroxisomes in plant cells?

    <p>To break down fatty acids and detoxify harmful substances</p> Signup and view all the answers

    What is the term for a group of organs that work together to perform complex functions?

    <p>Organ system</p> Signup and view all the answers

    What is the term for a complete living entity capable of performing all life processes?

    <p>Organism</p> Signup and view all the answers

    What is the term for the study of the structure, function, and behavior of living organisms?

    <p>Biology</p> Signup and view all the answers

    What is the purpose of observing cells under a microscope?

    <p>To understand how cells are organized and function within tissues, organs, and systems</p> Signup and view all the answers

    What is the purpose of labeling the different structures and organelles when observing cells under a microscope?

    <p>To understand the function of each structure and organelle</p> Signup and view all the answers

    What is the first step in preparing a microscope for observation?

    <p>Ensure the microscope is clean and properly set up</p> Signup and view all the answers

    What is the purpose of using a cover slip when preparing a slide for microscopy?

    <p>To hold the specimen in place</p> Signup and view all the answers

    What is the term for the basic structural unit of an organism?

    <p>Cell</p> Signup and view all the answers

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

    <p>To bring the specimen into general focus</p> Signup and view all the answers

    What is the term for the solution of water, enzymes, ions, salts, and other substances found in the central vacuole?

    <p>Vacuolar sap</p> Signup and view all the answers

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

    <p>To provide different magnifications of the specimen</p> Signup and view all the answers

    What is the purpose of staining in specimen preparation?

    <p>To enhance contrast and visibility of structures</p> Signup and view all the answers

    What is the term for cells that are capable of dividing and differentiating into various specialized cells?

    <p>Stem cells</p> Signup and view all the answers

    What is the level of organization that consists of groups of similar cells working together to perform a specific function?

    <p>Tissues</p> Signup and view all the answers

    What is the purpose of the diaphragm in a microscope?

    <p>To control the amount of light reaching the specimen</p> Signup and view all the answers

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

    <p>Unicellular organisms</p> Signup and view all the answers

    What is the purpose of carrying the microscope with one hand supporting the base and the other holding the arm?

    <p>To prevent damage to the microscope</p> Signup and view all the answers

    What is the term for the process of preparing specimens for microscopic observation?

    <p>Mounting</p> Signup and view all the answers

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

    <p>To focus the image quickly</p> Signup and view all the answers

    What is the term for a group of organs that work together to perform complex functions?

    <p>Systems</p> Signup and view all the answers

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

    <p>To change the magnification of the image</p> Signup and view all the answers

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

    <p>To observe living organisms and aquatic samples</p> Signup and view all the answers

    What is the primary function of stem cells in multicellular organisms?

    <p>To divide and differentiate into various specialized cells</p> Signup and view all the answers

    What is the primary difference between unicellular and multicellular organisms?

    <p>The number of cells in the organism</p> Signup and view all the answers

    What is the purpose of focusing smoothly and slowly when using a microscope?

    <p>To avoid damaging the lenses</p> Signup and view all the answers

    What is the primary function of the diaphragm in a microscope?

    <p>To control the amount of light reaching the specimen</p> Signup and view all the answers

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

    <p>To protect the body and cover surfaces</p> Signup and view all the answers

    What is the term for the organization of cells into tissues, organs, and systems in multicellular organisms?

    <p>Hierarchy of organization</p> Signup and view all the answers

    What is the primary function of nerve cells in multicellular organisms?

    <p>To transmit electrical signals</p> Signup and view all the answers

    What is the purpose of storing the microscope with the lowest objective lens in place after use?

    <p>To protect the lenses from damage</p> Signup and view all the answers

    What is the primary function of the cell wall in plant cells, besides providing structural support?

    <p>Regulating the entry and exit of substances</p> Signup and view all the answers

    Which of the following is a characteristic unique to plant cell walls?

    <p>Made of cellulose</p> Signup and view all the answers

    What is the role of thylakoids in chloroplasts?

    <p>Converting light energy into chemical energy</p> Signup and view all the answers

    What is the primary function of chloroplasts in plant cells?

    <p>Converting light energy into chemical energy</p> Signup and view all the answers

    What is the primary component of the plant cell wall that provides rigidity and strength?

    <p>Cellulose</p> Signup and view all the answers

    Which of the following organelles is responsible for photosynthesis in plant cells?

    <p>Chloroplasts</p> Signup and view all the answers

    What is the function of the cell wall in protecting plant cells?

    <p>Protecting against mechanical damage and pathogenic attack</p> Signup and view all the answers

    What is the primary difference between plant and animal cells?

    <p>Presence of a cell wall</p> Signup and view all the answers

    Which of the following is a characteristic of plant cells?

    <p>Presence of chloroplasts</p> Signup and view all the answers

    What is the function of grana in chloroplasts?

    <p>Converting light energy into chemical energy</p> Signup and view all the answers

    What is the main function of the stroma in a plant cell?

    <p>To convert carbon dioxide into glucose</p> Signup and view all the answers

    Which organelle is responsible for breaking down cellular waste and debris in plant cells?

    <p>Vacuoles</p> Signup and view all the answers

    What is the primary function of plasmodesmata in plant cells?

    <p>To facilitate communication and transport between adjacent plant cells</p> Signup and view all the answers

    What is the primary energy storage form in animal cells?

    <p>Glycogen</p> Signup and view all the answers

    Which type of microscope is suitable for viewing the ultrastructure of cells and tissues?

    <p>Electron microscope</p> Signup and view all the answers

    What is the primary function of centrioles in animal cells?

    <p>To organize the mitotic spindle during cell division</p> Signup and view all the answers

    What is the main difference between plant and animal cells?

    <p>All of the above</p> Signup and view all the answers

    What is the function of the eyepiece (ocular lens) in a light microscope?

    <p>To magnify the image</p> Signup and view all the answers

    What is the primary function of peroxisomes in both plant and animal cells?

    <p>To break down fatty acids and detoxify harmful substances</p> Signup and view all the answers

    What is the primary function of the vacuole in plant cells?

    <p>To store nutrients and waste products</p> Signup and view all the answers

    What is the primary function of the epithelial cells in the digestive system?

    <p>To facilitate the absorption of nutrients</p> Signup and view all the answers

    What is the term for the process by which cells organize to form tissues?

    <p>Histogenesis</p> Signup and view all the answers

    What is the primary function of the muscle cells in the digestive system?

    <p>To regulate the movement of food through the digestive system</p> Signup and view all the answers

    What is the term for a group of organs that work together to perform complex functions?

    <p>Organ system</p> Signup and view all the answers

    What is the primary function of the liver in the digestive system?

    <p>To store and filter blood</p> Signup and view all the answers

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

    <p>Differentiation</p> Signup and view all the answers

    What is the primary function of the pancreas in the digestive system?

    <p>To produce digestive enzymes</p> Signup and view all the answers

    What is the term for the basic structural unit of an organism?

    <p>Cell</p> Signup and view all the answers

    What is the primary function of the stomach in the digestive system?

    <p>To break down food into smaller molecules</p> Signup and view all the answers

    What is the term for the process of observing cells under a microscope?

    <p>Microscopy</p> Signup and view all the answers

    Which of the following is NOT a characteristic of an organism?

    <p>Being a single cell</p> Signup and view all the answers

    What is the purpose of using the coarse focus knob on a microscope?

    <p>To locate the specimen under the microscope</p> Signup and view all the answers

    What is the term for a group of organs that work together to perform complex functions?

    <p>Organ system</p> Signup and view all the answers

    What is the primary purpose of observing cells under a microscope?

    <p>To understand the complexity of living organisms</p> Signup and view all the answers

    What is the primary function of the fine focus knob on a microscope?

    <p>To sharpen the image of the specimen</p> Signup and view all the answers

    What is the purpose of labeling the different structures and organelles when observing cells under a microscope?

    <p>To understand the function of each structure and organelle</p> Signup and view all the answers

    What is the term for the process of preparing specimens for microscopic observation?

    <p>Mounting</p> Signup and view all the answers

    What is the primary function of the cover slip when preparing a slide for microscopy?

    <p>To avoid air bubbles when adding the specimen</p> Signup and view all the answers

    What is the term for the basic structural unit of an organism?

    <p>Cell</p> Signup and view all the answers

    What is the purpose of adjusting the light source for optimal illumination when observing cells under a microscope?

    <p>To optimize the visibility of the specimen</p> Signup and view all the answers

    What is the term for a group of organs that work together to perform complex functions?

    <p>Organ system</p> Signup and view all the answers

    What is the purpose of observing cells under a microscope?

    <p>To understand how cells are organized and function within tissues, organs, and systems</p> Signup and view all the answers

    What is the basic structural unit of an organism?

    <p>Cell</p> Signup and view all the answers

    What is the purpose of labeling the different structures and organelles when observing cells under a microscope?

    <p>To identify the different parts of the cell</p> Signup and view all the answers

    What is the first step in preparing a microscope for observation?

    <p>Ensure the microscope is clean and properly set up</p> Signup and view all the answers

    What type of tissue is found in the digestive system?

    <p>Epithelial tissue</p> Signup and view all the answers

    What is the purpose of the fine focus knob on a microscope?

    <p>To sharpen the image</p> Signup and view all the answers

    What is the term for a complete living entity capable of performing all life processes?

    <p>Organism</p> Signup and view all the answers

    What is the purpose of using a cover slip when preparing a slide for microscopy?

    <p>To avoid air bubbles</p> Signup and view all the answers

    What is the purpose of observing cells under a microscope?

    <p>To understand how cells are organized and function within tissues, organs, and systems</p> Signup and view all the answers

    What is the basic unit of life in multicellular organisms?

    <p>Cell</p> Signup and view all the answers

    What is the term for a group of organs that work together to perform complex functions?

    <p>Organ System</p> Signup and view all the answers

    What is the purpose of observing cells under a microscope?

    <p>To gain insight into the complexity and efficiency of living organisms</p> Signup and view all the answers

    What is the term for a complete living entity capable of performing all life processes?

    <p>Organism</p> Signup and view all the answers

    What is the purpose of labeling the different structures and organelles when observing cells under a microscope?

    <p>To understand the structure and function of cells</p> Signup and view all the answers

    What is the term for the sequence of steps to observe cells under a microscope?

    <p>Practical Activity</p> Signup and view all the answers

    What is the purpose of the cover slip when preparing a slide for microscopy?

    <p>To avoid air bubbles</p> Signup and view all the answers

    What is the first step in preparing a microscope for observation?

    <p>Ensure the microscope is clean and properly set up</p> Signup and view all the answers

    What is the purpose of the fine focus knob on a microscope?

    <p>To sharpen the image</p> Signup and view all the answers

    What is the term for the structural unit of an organism?

    <p>Cell</p> Signup and view all the answers

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