Principles Of Biology Lab Quiz

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  • 1/53 Questions

    What is the term for the system that scientist came up with to group similar organisms together?

    • Taxonomy
    • Classification system
    • Domains
    • Kingdoms
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About This Quiz

This is based on the lab portion of the college level course principles of biology. This quiz includes Taxonomy, Domains and Kingdoms of prokaryotic and eukaryotic cells, parts of a microscope, and etc. Every question came straight out of the Lab packet.

Principles Of Biology Lab Quiz - Quiz

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  • 2. 

    The field of classifying organisms is called _____.

    • Domains

    • Kingdoms

    • Taxonomy

    • Genus

    • Species

    Correct Answer
    A. Taxonomy
    Explanation
    Taxonomy is the correct answer because it refers to the field of classifying organisms based on their characteristics and relationships. It involves organizing organisms into hierarchical groups such as domains, kingdoms, phyla, classes, orders, families, genera, and species. Taxonomy helps scientists understand the diversity of life on Earth and how different species are related to each other.

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  • 3. 

    What is the term for the major categories that all organisms are grouped into within the taxonomic classification?

    • Domains

    • Kingdoms

    • Taxonomy

    Correct Answer
    A. Domains
    Explanation
    Domains are the highest level of classification in the taxonomic hierarchy. They represent the three major categories that all organisms are grouped into: Bacteria, Archaea, and Eukarya. These domains are based on fundamental differences in cellular structures and biochemistry. Bacteria and Archaea are both prokaryotes, while Eukarya includes all eukaryotic organisms. Therefore, the term "domains" accurately describes the major categories in taxonomic classification.

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  • 4. 

    The domains are split up into groupings of more similar organisms. What are these groups called?

    • Domains

    • Kingdoms

    • Phyla

    • Genus

    • Species

    Correct Answer
    A. Kingdoms
    Explanation
    The groups that the domains are split up into are called kingdoms. Kingdoms are broad categories used to classify organisms based on their similarities. They are one of the highest levels of classification in the biological classification system. Each kingdom represents a different group of organisms that share common characteristics and evolutionary relationships.

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  • 5. 

    Within each kingdom the organisms that are more alike are grouped into smaller and smaller groupings starting with _______ (or divisions).

    • Phyla

    • Genus

    • Domain

    • Species

    Correct Answer
    A. Phyla
    Explanation
    Organisms within each kingdom are grouped into smaller and smaller groupings, starting with phyla (or divisions). Phyla is a taxonomic rank that represents a major category or group of organisms that share certain characteristics. It is a higher level of classification than genus, domain, and species. The grouping of organisms into phyla allows for easier classification and organization based on their similarities and evolutionary relationships.

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  • 6. 

    As the characteristics for each organism are evaluated, eventually the groupings get so small that they only include quite similar organisms. What is the name for this category?

    • Species

    • Phyla

    • Genus

    • Taxonomy

    • Domain

    Correct Answer
    A. Genus
    Explanation
    The category described in the question, where groupings become so small that they only include quite similar organisms, is called "genus". In the hierarchical classification system of organisms, genus is a taxonomic rank that groups together closely related species. It is one level above species and one level below family.

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  • 7. 

    Each type of specific organism is given its own specific name to define it as different from every other organism. What classification is this?

    • Phyla

    • Species

    • Genus

    • Domain

    • Kingdom

    Correct Answer
    A. Species
    Explanation
    The given question is asking about the classification that is used to define a specific organism as different from every other organism. The correct answer is "species." In the Linnaean system of classification, species is the most specific and basic unit of classification. It refers to a group of organisms that share similar characteristics and can interbreed to produce fertile offspring. Each species is given its own specific name, which distinguishes it from other organisms.

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  • 8. 

    All living organisms are classified into 3 domains. What are they?(multiple answers)

    • Genus

    • Bacteria

    • Phyla

    • Eukarya

    • Archaea

    Correct Answer(s)
    A. Bacteria
    A. Eukarya
    A. Archaea
    Explanation
    Living organisms are classified into three domains: bacteria, eukarya, and archaea. Bacteria are single-celled organisms that lack a nucleus and membrane-bound organelles. Eukarya includes organisms with a true nucleus and membrane-bound organelles, such as plants, animals, fungi, and protists. Archaea are single-celled organisms that are similar to bacteria but have distinct genetic and biochemical characteristics. These three domains encompass the vast diversity of life on Earth and provide a framework for understanding the relationships between different organisms.

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  • 9. 

    The three domains of living organisms are broken down into major kingdoms, what are they?(multiple answers)

    • Archaebacteria

    • Eubacteria

    • Fungi

    • Plantae

    • Animalia

    Correct Answer(s)
    A. Archaebacteria
    A. Eubacteria
    A. Fungi
    A. Plantae
    A. Animalia
    Explanation
    The correct answer includes all five major kingdoms: Archaebacteria, Eubacteria, Fungi, Plantae, and Animalia. These kingdoms are used to classify and categorize living organisms based on their characteristics and evolutionary relationships. Archaebacteria and Eubacteria are both types of bacteria, while Fungi are a group of organisms that include mushrooms and yeasts. Plantae refers to plants, and Animalia refers to animals. These kingdoms help scientists organize and study the vast diversity of living organisms on Earth.

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  • 10. 

    What are the domain(s) of a prokaryotic cell?(multiple answers)

    • Bacteria

    • Eukarya

    • Archaea

    Correct Answer(s)
    A. Bacteria
    A. Archaea
    Explanation
    The domain(s) of a prokaryotic cell are Bacteria and Archaea. Prokaryotic cells are characterized by the absence of a nucleus and other membrane-bound organelles. Bacteria and Archaea are two distinct domains of prokaryotes. Bacteria are the most common and well-known prokaryotes, while Archaea are a group of microorganisms that are often found in extreme environments. Therefore, the correct answer is Bacteria, Archaea.

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  • 11. 

    What is the domain of a eukaryotic cell?

    • Bacteria

    • Eukarya

    • Archaea

    Correct Answer
    A. Eukarya
    Explanation
    The domain of a eukaryotic cell is Eukarya. Eukarya is one of the three domains of life, along with Bacteria and Archaea. Eukaryotic cells are characterized by having a nucleus and membrane-bound organelles. They are found in organisms such as plants, animals, fungi, and protists. Bacteria and Archaea, on the other hand, are prokaryotic cells, lacking a nucleus and membrane-bound organelles. Therefore, Eukarya is the correct answer for the domain of a eukaryotic cell.

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  • 12. 

    What are the kingdoms of a prokaryotic cell?(multiple answers)

    • Eubacteria

    • Archaebacteria

    • Fungi

    • Plantae

    • Animalia

    Correct Answer(s)
    A. Eubacteria
    A. Archaebacteria
    Explanation
    The correct answer is Eubacteria and Archaebacteria. Prokaryotic cells are divided into two main kingdoms: Eubacteria and Archaebacteria. Eubacteria are the most common and well-known prokaryotes, found in various environments such as soil, water, and human bodies. Archaebacteria, on the other hand, are extremophiles that can survive in extreme conditions like high temperatures, high salinity, or acidic environments. They are often found in places like hot springs and deep-sea hydrothermal vents. Fungi, Plantae, and Animalia are not kingdoms of prokaryotic cells but rather belong to the domain Eukarya.

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  • 13. 

    What are the kingdoms of a eukaryotic cell?(multiple answers)

    • Eubacteria

    • Protists

    • Fungi

    • Plantae

    • Animalia

    Correct Answer(s)
    A. Protists
    A. Fungi
    A. Plantae
    A. Animalia
    Explanation
    The correct answer includes Protists, Fungi, Plantae, and Animalia. These are the four kingdoms of eukaryotic cells. Eubacteria is not a kingdom of eukaryotic cells; it belongs to the domain Bacteria, which consists of prokaryotic cells.

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  • 14. 

    Name the term:capable of making one's own food. Ex. plants

    • Eukaryotic cells

    • Autotrophic

    • Heterotrophic

    • Motile

    • Unicellular

    Correct Answer
    A. Autotrophic
    Explanation
    Autotrophic refers to the ability of an organism to produce its own food. This term is used to describe organisms, such as plants, that are capable of synthesizing their own nutrients through photosynthesis or chemosynthesis. Autotrophic organisms use energy from sunlight or inorganic compounds to convert carbon dioxide into organic compounds, such as glucose. This process allows them to sustain themselves without relying on external sources for nutrition. Therefore, autotrophic is the correct term to describe organisms that are capable of making their own food.

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  • 15. 

    Name the term:composed of many cells.

    • Unicellular

    • Motile

    • Nonmotile

    • Multicellular

    • Autotrophic

    Correct Answer
    A. Multicellular
    Explanation
    The term "multicellular" refers to an organism that is composed of many cells. This means that the organism is made up of multiple cells working together to form a functioning organism. Unlike unicellular organisms, which consist of only one cell, multicellular organisms have specialized cells that perform different functions to support the overall survival and functioning of the organism. Therefore, multicellularity is a characteristic commonly found in complex organisms such as plants, animals, and fungi.

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  • 16. 

    Name the term:This general term is used to describe any eukaryotic organism that tends to be simpler in its overall organization than fungus, plants, or animals. This is a widely-varying group of typically unicellular organisms (but also simpler multicellular organisms) that do not fit into the other eukaryotic kingdoms.

    • Prokaryotic cells

    • Eukaryotic cells

    • Protists

    • Nucleus

    Correct Answer
    A. Protists
    Explanation
    Protists are a general term used to describe eukaryotic organisms that are simpler in organization compared to fungi, plants, or animals. They are a diverse group that includes typically unicellular organisms, but also simpler multicellular organisms. Protists do not fit into the other eukaryotic kingdoms, making them a separate category.

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  • 17. 

    Name the term:Having the ability to move.

    • Nonmotile

    • Motile

    • Nucleus

    • Heterotrophic

    Correct Answer
    A. Motile
    Explanation
    Motile refers to the ability to move. It is the correct answer because it directly corresponds to the given term "Having the ability to move." Nonmotile means lacking the ability to move, nucleus refers to the central part of a cell, and heterotrophic refers to organisms that obtain their energy from consuming other organisms.

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  • 18. 

    Name the term:incapable of self-generated movement

    • Nucleus

    • Motile

    • Nonmotile

    • Autotrophic

    • Unicellular

    Correct Answer
    A. Nonmotile
    Explanation
    The term "nonmotile" refers to an organism or structure that is incapable of self-generated movement. This means that it cannot move on its own and relies on external forces or other organisms for movement. In the given options, "nucleus," "motile," "autotrophic," and "unicellular" do not pertain to the concept of being incapable of self-generated movement. Therefore, the correct answer is "nonmotile."

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  • 19. 

    Name the term:A region within eukaryotic cells that is bordered by membrane and contains the cell's genetic information within it.

    • Autotrophic

    • Nucleus

    • Protists

    • Heterotrophic

    • Motile

    Correct Answer
    A. Nucleus
    Explanation
    The correct answer is nucleus. The nucleus is a region within eukaryotic cells that is surrounded by a membrane and contains the cell's genetic information within it. It controls the cell's activities and is responsible for the transmission of genetic traits to offspring.

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  • 20. 

    Name the term:Simpler, smaller cells. They do not have a nucleus or any other membrane-surrounded regions within them.

    • Eukaryotic cells

    • Unicellular

    • Multicellular

    • Prokaryotic cells

    • Protists

    Correct Answer
    A. Prokaryotic cells
    Explanation
    Prokaryotic cells are the correct answer. These cells are characterized by their simplicity and small size, lacking a nucleus and other membrane-bound organelles. They are found in organisms such as bacteria and archaea. Unlike eukaryotic cells, which have a true nucleus and other complex structures, prokaryotic cells are simpler in structure and function.

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  • 21. 

    Name the term:More complex, larger cells. They contain a nucleus and other membrane-surrounded regions.

    • Protists

    • Prokaryotic cells

    • Eukaryotic cells

    • Nucleus

    Correct Answer
    A. Eukaryotic cells
    Explanation
    Eukaryotic cells are more complex and larger compared to prokaryotic cells. They contain a nucleus, which is a membrane-surrounded region that houses the genetic material of the cell. Eukaryotic cells also have other membrane-surrounded regions, such as organelles like mitochondria and endoplasmic reticulum. Protists are a type of eukaryotic cell, but the term "eukaryotic cells" encompasses a broader range of organisms. Therefore, the correct answer is eukaryotic cells.

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  • 22. 

    Name the term:Needing to acquire food from some other source. Ex. animals

    • Multicellular

    • Autotrophic

    • Protists

    • Heterotrophic

    • Eukaryotic cells

    Correct Answer
    A. Heterotrophic
    Explanation
    Heterotrophic refers to the ability of organisms, such as animals, to acquire food from external sources. Unlike autotrophic organisms that can produce their own food through photosynthesis or chemosynthesis, heterotrophs rely on consuming other organisms or organic matter for their energy and nutrient requirements. This term accurately describes the characteristic of needing to acquire food from some other source, as mentioned in the question.

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  • 23. 

    Name the term:composed of only one cell

    • Multicellular

    • Motile

    • Unicellular

    • Heterotrophic

    • Autotrophic

    Correct Answer
    A. Unicellular
    Explanation
    The term "unicellular" refers to an organism that is composed of only one cell. This means that the entire organism, including all its functions and processes, is carried out by a single cell. Examples of unicellular organisms include bacteria, protozoa, and some types of algae. These organisms are capable of performing all necessary functions for survival, such as reproduction, metabolism, and response to stimuli, within a single cell.

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  • 24. 

    How are you supposed to carry a microscope?

    • With one hand

    • Upside down

    • Upright with two hands

    • Carelessly

    Correct Answer
    A. Upright with two hands
    Explanation
    To carry a microscope, it is recommended to hold it upright with two hands. This ensures stability and prevents any accidental damage or dropping of the delicate instrument. Carrying it with one hand may lead to imbalance and potential accidents. Carrying it upside down is not advisable as it can damage the lenses and other sensitive components. Carrying it carelessly is also not recommended as it can result in mishandling and potential breakage.

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  • 25. 

    When do you inspect the microscope?

    • After using it

    • Before using it

    • You don't and let the next class do it

    Correct Answer
    A. Before using it
    Explanation
    Before using the microscope, it is important to inspect it. This is necessary to ensure that the microscope is in proper working condition and free from any damage or defects. By inspecting the microscope beforehand, any potential issues can be identified and addressed, thus preventing any inconvenience or disruption during its use. It also helps in maintaining the accuracy and reliability of the microscope's observations and results. Therefore, inspecting the microscope before using it is a crucial step in ensuring its optimal performance.

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  • 26. 

    What can you clean the lenses with?

    • Only paper towels

    • Paper towels and lens paper

    • Only lens paper

    • Anything

    • Tissue

    Correct Answer
    A. Only lens paper
    Explanation
    Lens paper is specifically designed for cleaning lenses and is made of a soft and non-abrasive material that won't scratch or damage the lens surface. Paper towels and tissues may contain rough fibers that can potentially scratch the lens. Using anything other than lens paper or a specialized lens cleaning solution can increase the risk of damaging the lenses.

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  • 27. 

    Is it alright to push a microscope across the table?

    • Yes

    • No

    Correct Answer
    A. No
    Explanation
    It is not alright to push a microscope across the table because microscopes are delicate instruments that require careful handling. Pushing a microscope can cause damage to its fragile components, such as the lenses or the stage. It is recommended to always carry a microscope using both hands and place it gently on a stable surface to avoid any potential harm.

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  • 28. 

    Unplug the microscope carefully by:

    • Ripping it out of the wall

    • Pull gently on the plug at the outlet

    • Pulling the cord away from the plug

    Correct Answer
    A. Pull gently on the plug at the outlet
    Explanation
    The correct answer is "pull gently on the plug at the outlet" because it emphasizes the careful and cautious approach to unplugging the microscope. Ripping it out of the wall or pulling the cord away from the plug can cause damage to the microscope or the electrical system. Pulling gently on the plug at the outlet ensures a safe and proper disconnection without any unnecessary force or risk of harm.

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  • 29. 

    What do you do with the microscope after you're done using it?

    • Leave it for the next class

    • Leave it for the professor

    • Remove the last slide, wipe down materials from the stage, and return the microscope to its proper place.

    • Do nothing

    Correct Answer
    A. Remove the last slide, wipe down materials from the stage, and return the microscope to its proper place.
    Explanation
    After using the microscope, it is important to remove the last slide to prevent any damage or contamination. Wiping down materials from the stage ensures cleanliness and prepares the microscope for the next user. Finally, returning the microscope to its proper place ensures that it is stored safely and ready for future use.

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  • 30. 

    Which part of the microscope supports the body tube and lenses?

    • Base

    • Arm

    • Stage

    • Mechanical stage knobs

    • Revolving nose piece

    Correct Answer
    A. Arm
    Explanation
    The arm of the microscope is the correct answer because it is the part that supports the body tube and lenses. The arm is a curved structure that connects the body tube to the base of the microscope, providing stability and support for the optical components. It allows for easy movement and adjustment of the lenses while keeping them securely in place.

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  • 31. 

    Which part of the microscope supports the entire microscope?

    • Base

    • Arm

    • Stage

    • Body tube

    • Objective lenses

    Correct Answer
    A. Base
    Explanation
    The base of the microscope supports the entire microscope. It is the sturdy bottom part of the microscope that provides stability and prevents it from tipping over. The base is usually made of heavy metal or strong plastic material to ensure that it can support the weight of the microscope and keep it steady during use. Without a solid base, the microscope would not be able to stand upright and function properly.

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  • 32. 

    What is the name for the lens in the upper part of the microscope?

    • Objective lenses

    • Ocular or eyepiece

    • Fine adjustment knob

    • Body tube

    • Base

    Correct Answer
    A. Ocular or eyepiece
    Explanation
    The correct answer is "ocular or eyepiece" because the ocular or eyepiece is the lens located in the upper part of the microscope that the viewer looks through to observe the specimen. This lens magnifies the image produced by the objective lenses, allowing for greater detail and clarity. The ocular or eyepiece is an essential component of the microscope and is responsible for the final magnification of the image before it reaches the viewer's eye.

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  • 33. 

    The part of the microscope that holds the ocular at one end and the nosepiece at the other.

    • Stage

    • Body tube

    • Light

    • Arm

    • Ocular

    Correct Answer
    A. Body tube
    Explanation
    The body tube of a microscope is the part that holds the ocular (eyepiece) at one end and the nosepiece (which holds the objective lenses) at the other end. It is a cylindrical tube that connects the eyepiece to the objective lenses, allowing light to pass through and magnify the specimen. The body tube is an essential component of the microscope as it helps to maintain the proper alignment and distance between the eyepiece and the objective lenses, ensuring accurate and clear viewing of the specimen.

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  • 34. 

    The part of a microscope that is located at the lower end of the body tube. A revolving device that holds the objectives.

    • Stage

    • Substage condenser

    • Objective lenses

    • Revolving nosepiece

    • Light

    Correct Answer
    A. Revolving nosepiece
    Explanation
    The revolving nosepiece is the correct answer because it is the part of a microscope that is located at the lower end of the body tube and holds the objectives. It allows the user to easily switch between different objective lenses without having to manually remove and replace them.

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  • 35. 

    This part of a microscope is located on the revolving nosepiece. There are four lenses.

    • Objective lenses

    • Ocular

    • Stage

    • Iris diaphragm lever

    • Body tube

    Correct Answer
    A. Objective lenses
    Explanation
    The objective lenses are located on the revolving nosepiece of a microscope. They are used to magnify the specimen being observed. Since there are four lenses mentioned in the question, it is clear that the correct answer is objective lenses. The other options mentioned, such as ocular, stage, iris diaphragm lever, and body tube, do not match the description given in the question.

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  • 36. 

    The horizontal platform upon which the slide rests.

    • Substage condenser

    • Mechanical stage knobs

    • Base

    • Stage

    • Light

    Correct Answer
    A. Stage
    Explanation
    The stage is the horizontal platform upon which the slide rests. It is the part of the microscope that holds the specimen in place and allows it to be viewed under the microscope. Without a stage, there would be no platform for the slide to rest on, making it impossible to view the specimen. Therefore, the stage is the correct answer in this context.

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  • 37. 

    Lens found beneath the stage that concentrates light before it passes through the specimen to be viewed.

    • Light

    • Stage

    • Body tube

    • Substage condenser

    • Arm

    Correct Answer
    A. Substage condenser
    Explanation
    The substage condenser is the correct answer because it is the lens found beneath the stage that concentrates light before it passes through the specimen to be viewed. The substage condenser helps to focus and direct the light onto the specimen, allowing for better visibility and clarity when viewing the specimen under the microscope.

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  • 38. 

    Small lever beneath the condenser. Allows the observer to regulate the amount of light passing through the specimen.

    • Iris diaphragm lever

    • Light

    • Mechanical stage knobs

    • Fine adjustment knob

    • Objective lens

    Correct Answer
    A. Iris diaphragm lever
    Explanation
    The iris diaphragm lever is the correct answer because it is the small lever beneath the condenser that allows the observer to regulate the amount of light passing through the specimen. This lever controls the size of the aperture in the condenser, which in turn controls the amount of light that reaches the specimen. By adjusting the iris diaphragm lever, the observer can optimize the lighting conditions for better visibility and clarity of the specimen under the microscope.

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  • 39. 

    Provides illumination of the specimen.

    • Mechanical stage knobs

    • Ocular

    • Arm

    • Objective lens

    • Light

    Correct Answer
    A. Light
    Explanation
    The light provides illumination of the specimen, allowing it to be visible under the microscope. Without the light, the specimen would be difficult or impossible to see.

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  • 40. 

    Small circular knobs adjacent to or below the stage. Allows the observer to move the slide across the stage either forward or backwards or laterally.

    • Substage condenser

    • Mechanical stage knobs

    • Body tube

    • Base

    • Course adjustment knob

    Correct Answer
    A. Mechanical stage knobs
    Explanation
    The small circular knobs mentioned in the question are called mechanical stage knobs. These knobs are located adjacent to or below the stage of a microscope. They allow the observer to move the slide across the stage in various directions, such as forward, backward, or laterally. By adjusting these knobs, the observer can position the slide and focus on specific areas of interest. Therefore, mechanical stage knobs are the correct answer in this case.

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  • 41. 

    Moves the stage up or down to the approximate correct distance. This part of the microscope should only be used when using the low powered objective.

    • Fine adjustment knob

    • Ocular

    • Mechanical stage knobs

    • Course adjustment knob

    • Light

    Correct Answer
    A. Course adjustment knob
    Explanation
    The course adjustment knob is the correct answer because it is used to move the stage up or down to the approximate correct distance. This adjustment is necessary when using the low powered objective on the microscope. The course adjustment knob allows for larger, more noticeable movements of the stage, which helps in quickly bringing the specimen into focus.

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  • 42. 

    Moves the stage up and down small distances. Allows fine focus of the specimen.

    • Course adjustment knob

    • Fine adjustment knob

    • Substage condenser

    • Mechanical stage knobs

    • Ocular

    Correct Answer
    A. Fine adjustment knob
    Explanation
    The fine adjustment knob is used to move the stage up and down small distances, allowing for precise focusing of the specimen. This knob is used after the initial focusing is done using the coarse adjustment knob. It helps in achieving a clear and sharp image by making small adjustments to the focus. The fine adjustment knob is essential for obtaining detailed observations and accurate measurements of the specimen.

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  • 43. 
    Name part A - ProProfs

    Name part A

    • Stage

    • Oculars

    • Arm

    • Base

    • Objective

    Correct Answer
    A. Oculars
    Explanation
    The given answer, "oculars," is the correct name for one of the parts listed. Oculars are the lenses or eyepieces through which a person looks to view the object being observed. The other parts mentioned, such as stage, arm, base, and objective, are also components of a microscope, but in this case, the correct answer specifically refers to the oculars.

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  • 44. 
    Name part B - ProProfs

    Name part B

    • Objective

    • Revolving nosepiece

    • Base

    • Fine adjustment knob

    • Stage

    Correct Answer
    A. Revolving nosepiece
    Explanation
    The given answer, revolving nosepiece, is correct because it is one of the parts mentioned in the list. The other parts listed are objective, base, fine adjustment knob, and stage, but the revolving nosepiece is the only one that matches the given answer.

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  • 45. 
    Name part C - ProProfs

    Name part C

    • Oculars

    • Course adjustment knobs

    • Objective

    • Base

    • Arm

    Correct Answer
    A. Objective
    Explanation
    The objective is a part of the name C. It is one of the main components of binoculars and is responsible for gathering light and focusing it onto the eyepiece. It is usually located at the front end of the binoculars and is adjustable to allow for focusing on different distances.

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  • 46. 
    Name part D - ProProfs

    Name part D

    • Mechanical stage knobs

    • Light adjustment dial

    • Stage

    • Fine adjustment knob

    • Oculars

    Correct Answer
    A. Stage
    Explanation
    The given options consist of different parts of a microscope. Out of all the options, "stage" is the correct answer. The stage is the flat platform where the slide or specimen is placed for observation. It is an essential part of the microscope as it holds the specimen in position and allows it to be moved around for examination. The other options such as mechanical stage knobs, light adjustment dial, fine adjustment knob, and oculars are also parts of a microscope but are not specifically referred to as "stage".

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  • 47. 
    Name part E - ProProfs

    Name part E

    • Base

    • Arm

    • Light adjustment dial

    • Light source

    • Revolving nosepiece

    Correct Answer
    A. Light source
    Explanation
    The given options are a list of different parts, and the question asks for the name of part E. Among the options, the only one that can be identified as part E is "light source."

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  • 48. 
    Name part F - ProProfs

    Name part F

    • Base

    • Arm

    • Light source

    • Fine adjustment knob

    • Objective

    Correct Answer
    A. Base
    Explanation
    The correct answer is "base" because it is listed as one of the parts mentioned in the question. The other options, such as arm, light source, fine adjustment knob, and objective, are not mentioned in the question. Therefore, "base" is the only part that can be identified based on the given information.

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  • 49. 
    Name part G - ProProfs

    Name part G

    • Base

    • Stage

    • Oculars

    • Arm

    • Objective

    Correct Answer
    A. Arm
    Explanation
    The given list consists of various parts of a microscope. Out of all the options, "arm" is the only part that is present in a microscope. The base provides stability, the stage holds the specimen, the oculars are the eyepieces, and the objective is the lens system. Therefore, the correct answer is "arm" as it is a crucial component of a microscope.

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