Podcast
Questions and Answers
All living organisms are made up of ______.
All living organisms are made up of ______.
cells
You need to use a ______ to observe cells in detail.
You need to use a ______ to observe cells in detail.
microscope
The objective lens and eyepiece lens work together to provide total ______.
The objective lens and eyepiece lens work together to provide total ______.
magnification
The ______ holds the specimen in place while it is being observed.
The ______ holds the specimen in place while it is being observed.
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To bring the object into clarity, turn the ______ knobs.
To bring the object into clarity, turn the ______ knobs.
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All living organisms are made of ______.
All living organisms are made of ______.
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Robert Hooke looked at a thin slice of cork through a ______.
Robert Hooke looked at a thin slice of cork through a ______.
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To make a good observation, the object must be thin enough for ______ to travel through it.
To make a good observation, the object must be thin enough for ______ to travel through it.
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The total magnification is calculated by multiplying the eyepiece lens magnification by the ______ lens magnification.
The total magnification is calculated by multiplying the eyepiece lens magnification by the ______ lens magnification.
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Looking carefully and in detail at an object is called making an ______.
Looking carefully and in detail at an object is called making an ______.
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Cells are the smallest units found in a ______.
Cells are the smallest units found in a ______.
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To see a very small object in detail, you need to use a ______.
To see a very small object in detail, you need to use a ______.
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About 100 animal cells would fit across the width of a tiny ______.
About 100 animal cells would fit across the width of a tiny ______.
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The main function of the ______ in an animal cell is to control the cell and contain genetic material.
The main function of the ______ in an animal cell is to control the cell and contain genetic material.
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Plant cells have an additional structure called the ______, which provides support and protection.
Plant cells have an additional structure called the ______, which provides support and protection.
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Mitochondria are known as the powerhouses of the cell because they are where ______ occurs.
Mitochondria are known as the powerhouses of the cell because they are where ______ occurs.
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Chloroplasts are found in ______ cells and are responsible for photosynthesis.
Chloroplasts are found in ______ cells and are responsible for photosynthesis.
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The ______ serves as a barrier that controls what enters and exits the cell.
The ______ serves as a barrier that controls what enters and exits the cell.
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Plant cells contain a rigid ______ made of cellulose.
Plant cells contain a rigid ______ made of cellulose.
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The ______ is responsible for conducting photosynthesis by capturing energy from the sun.
The ______ is responsible for conducting photosynthesis by capturing energy from the sun.
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A large ______ in plant cells helps maintain the cell's shape by holding cell sap.
A large ______ in plant cells helps maintain the cell's shape by holding cell sap.
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______ functions to control the activities of the cell.
______ functions to control the activities of the cell.
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Mitochondria are the organelles that conduct respiration and release ______ for cell activities.
Mitochondria are the organelles that conduct respiration and release ______ for cell activities.
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The ______ controls what goes in and out of the cell.
The ______ controls what goes in and out of the cell.
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The prefix ______ means 'light' or 'relating to light.'
The prefix ______ means 'light' or 'relating to light.'
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Plant cell types like ______ contain chloroplasts for photosynthesis.
Plant cell types like ______ contain chloroplasts for photosynthesis.
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Sperm cells carry male genetic ______.
Sperm cells carry male genetic ______.
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Leaf cells near the top of a leaf are packed with ______ for photosynthesis.
Leaf cells near the top of a leaf are packed with ______ for photosynthesis.
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Root hair cells create a large surface area for absorbing ______ and nutrients.
Root hair cells create a large surface area for absorbing ______ and nutrients.
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The long tail of a sperm cell enables ______.
The long tail of a sperm cell enables ______.
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Specialized cells have unique ______ to perform their functions.
Specialized cells have unique ______ to perform their functions.
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Euglena can make their own food through ______ if there is enough light.
Euglena can make their own food through ______ if there is enough light.
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Euglena reproduce by ______ fission, where the nucleus divides first.
Euglena reproduce by ______ fission, where the nucleus divides first.
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Euglena have ______, which allow them to perform photosynthesis.
Euglena have ______, which allow them to perform photosynthesis.
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Unlike amoebas, euglenas have a ______ that helps them move towards light.
Unlike amoebas, euglenas have a ______ that helps them move towards light.
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Both euglenas and amoebas have a ______, which is crucial for cell function and reproduction.
Both euglenas and amoebas have a ______, which is crucial for cell function and reproduction.
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Water diffuses into the plant through ______ hair cells.
Water diffuses into the plant through ______ hair cells.
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Plants need water for ______.
Plants need water for ______.
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The movement of substances from an area of high concentration to an area of low concentration is called ______.
The movement of substances from an area of high concentration to an area of low concentration is called ______.
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A lack of sufficient water causes the vacuoles to ______, making the cells floppy.
A lack of sufficient water causes the vacuoles to ______, making the cells floppy.
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The ______ fills with water to help maintain the shape and rigidity of the plant cell.
The ______ fills with water to help maintain the shape and rigidity of the plant cell.
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If plants do not have enough water, they will ______.
If plants do not have enough water, they will ______.
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The diffusion of water molecules is specifically referred to as ______.
The diffusion of water molecules is specifically referred to as ______.
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Burnt toast particles start with a higher concentration in the kitchen and spread into the ______.
Burnt toast particles start with a higher concentration in the kitchen and spread into the ______.
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A specialised cell has changed its shape or structure to perform a specific ______.
A specialised cell has changed its shape or structure to perform a specific ______.
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Nerve cells, also known as ______, carry electrical impulses around the body.
Nerve cells, also known as ______, carry electrical impulses around the body.
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Red blood cells transport ______ throughout the body.
Red blood cells transport ______ throughout the body.
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Sperm cells have a head and a long ______, enabling them to swim to the egg.
Sperm cells have a head and a long ______, enabling them to swim to the egg.
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Leaf cells are long and thin to provide a large surface area for ______.
Leaf cells are long and thin to provide a large surface area for ______.
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Root hair cells are designed to absorb ______ and minerals from the soil.
Root hair cells are designed to absorb ______ and minerals from the soil.
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Red blood cells lack a ______, which distinguishes them from most animal cells.
Red blood cells lack a ______, which distinguishes them from most animal cells.
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The sciatic nerve is the largest and longest ______ in the body.
The sciatic nerve is the largest and longest ______ in the body.
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Substances move in and out of cells by __________.
Substances move in and out of cells by __________.
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During respiration, energy is transferred from __________ and oxygen.
During respiration, energy is transferred from __________ and oxygen.
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Water diffuses into plants through the __________.
Water diffuses into plants through the __________.
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Carbon dioxide passes out of the cell into the __________.
Carbon dioxide passes out of the cell into the __________.
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The concentration of a substance means the number of particles of a substance present in an __________.
The concentration of a substance means the number of particles of a substance present in an __________.
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If plants are not watered, the cells inside will lose __________.
If plants are not watered, the cells inside will lose __________.
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Particles move from areas of high concentration to areas of __________ concentration.
Particles move from areas of high concentration to areas of __________ concentration.
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The smell of burnt toast spreads from the kitchen to the rest of the house due to __________.
The smell of burnt toast spreads from the kitchen to the rest of the house due to __________.
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When carbon dioxide is produced in cells, it needs to be transported out to maintain __________ balance.
When carbon dioxide is produced in cells, it needs to be transported out to maintain __________ balance.
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Plants require a constant supply of water to prevent __________.
Plants require a constant supply of water to prevent __________.
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A unicellular organism is made up of only one __________.
A unicellular organism is made up of only one __________.
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The structure that controls the growth and reproduction of the amoeba is called the __________.
The structure that controls the growth and reproduction of the amoeba is called the __________.
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Amoebas use __________ to move and capture food.
Amoebas use __________ to move and capture food.
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A __________ is a tail-like structure that euglena use for movement.
A __________ is a tail-like structure that euglena use for movement.
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Euglenas can produce food using __________, which trap light energy.
Euglenas can produce food using __________, which trap light energy.
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The Naegleria fowleri amoeba is commonly referred to as the __________ amoeba.
The Naegleria fowleri amoeba is commonly referred to as the __________ amoeba.
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Euglenas can reproduce by __________ themselves.
Euglenas can reproduce by __________ themselves.
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The __________ surrounds the amoeba and provides structure to the cell.
The __________ surrounds the amoeba and provides structure to the cell.
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Study Notes
Unicellular Organisms
- Unicellular organisms are made up of only one cell.
- They are not classified as plants or animals.
- Early organisms on Earth were unicellular.
- Many organisms today are still single-celled.
Amoeba
- An amoeba is a single-celled organism that lacks a fixed shape.
- It resembles a blob of jelly.
- Amoebas can be found in freshwater, saltwater, soil, and even inside animals.
Amoeba Structures
- Cell membrane: Encloses the amoeba.
- Cytoplasm: The material inside the cell membrane.
- Nucleus: Controls the amoeba's growth and reproduction.
- Contractile vacuole: Removes water and waste.
- Food vacuole: Stores food particles.
- Pseudopod: Extension of the cell membrane that aids in movement and capturing food.
Amoeba Movement and Feeding
- Amoebas move by altering their body shape.
- They extend pseudopods in their desired direction of travel, followed by the rest of the cell.
- Amoebas capture food by extending pseudopods to surround it, forming a food vacuole.
Similarities with Animal Cells
- Amoebas share two structures with animal cells:
- Nucleus
- Cell membrane
Euglena
- A Euglena is a microscopic, single-celled organism.
- It possesses a flagellum, a tail-like structure used for locomotion.
- Euglena also have a chloroplast, used for photosynthesis.
- They have a red eye spot that helps them to detect light.
Euglena Feeding
- Euglena, like amoebas, contain chloroplasts.
- They use these chloroplasts to trap light energy for food production.
- If light is unavailable, euglenas can also feed by engulfing bacteria.
Euglena
- Microscopic, unicellular organism found in freshwater.
- Contains a nucleus, chloroplast, contractile vacuole, flagellum, and an eye spot.
- Can produce food through photosynthesis in the presence of light.
- Can consume other microorganisms like bacteria and algae for food in the absence of light.
- Reproduces through binary fission:
- Nucleus divides first.
- Cytoplasm divides, creating two identical cells.
Differences between Euglena and Amoeba
- Euglena: have chloroplasts (photosynthesis), a flagellum, and an eye spot.
- Amoeba: lacks chloroplasts, flagellum, and eye spot.
Naegleria fowleri
- A type of amoeba known as the brain-eating amoeba.
- Found in warm, freshwater environments.
- Rarely found in humans.
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Description
This quiz explores the fascinating world of unicellular organisms, specifically focusing on the amoeba. Learn about its structure, movement, and how it feeds, alongside the significance of single-celled life forms in our ecosystem.
