1. Cell Biology
14
Lessons
The study of cell structure and function is known as cell biology, and it is based on the idea that the cell is the most basic unit of life. Concentrating on the cell allows for a more in-depth understanding of the tissues and organisms that cells make up.
Tutorials
- Lesson 1 Cell Division
- Lesson 2 Stem Cells
- Lesson 3 Mitosis and the Cell Cycle
- Lesson 4 Chromosomes
- Lesson 5 Cell Structure
- Lesson 6 Cell Differentiation
- Lesson 7 Cell Specialisation
- Lesson 8 Animal and Plant Cells
- Lesson 9 Eukaryotes and Prokaryotes
- Lesson 10 Transport in Cells
- Lesson 11 Osmosis
- Lesson 12 Diffusion
- Lesson 13 Active Transport
- Lesson 14 Practice Questions + Mark Schemes
Lesson 1
Cell Division
In the form of a molecule called DNA, chromosomes carry genetic information. Mitosis is a method of cell division that ensures that each new cell created contains the same genetic information as the parent cell. We will cover topics such as: Chromosomes, Mitosis and the Cell Cycle, Stem Cells.
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Lesson 2
Stem Cells
In the form of a molecule called DNA, chromosomes carry genetic information. Mitosis is a method of cell division that ensures that each new cell created contains the same genetic information as the parent cell.
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Lesson 3
Mitosis and the Cell Cycle
In the form of a molecule called DNA, chromosomes carry genetic information. Mitosis is a method of cell division that ensures that each new cell created contains the same genetic information as the parent cell.
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Lesson 4
Chromosomes
In the form of a molecule called DNA, chromosomes carry genetic information. Mitosis is a method of cell division that ensures that each new cell created contains the same genetic information as the parent cell.
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Lesson 5
Cell Structure
Individual components with specialised activities that are required to carry out life's operations make up the cell structure. The cell wall, cell membrane, cytoplasm, nucleus, and cell organelles are among these components.
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Lesson 6
Cell Differentiation
Individual components with specialised activities that are required to carry out life's operations make up the cell structure. The cell wall, cell membrane, cytoplasm, nucleus, and cell organelles are among these components.
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Lesson 7
Cell Specialisation
Individual components with specialised activities that are required to carry out life's operations make up the cell structure. The cell wall, cell membrane, cytoplasm, nucleus, and cell organelles are among these components.
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Lesson 8
Animal and Plant Cells
Individual components with specialised activities that are required to carry out life's operations make up the cell structure. The cell wall, cell membrane, cytoplasm, nucleus, and cell organelles are among these components.
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Lesson 9
Eukaryotes and Prokaryotes
Individual components with specialised activities that are required to carry out life's operations make up the cell structure. The cell wall, cell membrane, cytoplasm, nucleus, and cell organelles are among these components.
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Lesson 10
Transport in Cells
Substances must travel into and out of cells for an organism to function. Diffusion, osmosis, and active transport are three processes that contribute to this movement.
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Lesson 11
Osmosis
Substances must travel into and out of cells for an organism to function. Diffusion, osmosis, and active transport are three processes that contribute to this movement.
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Lesson 12
Diffusion
Substances must travel into and out of cells for an organism to function. Diffusion, osmosis, and active transport are three processes that contribute to this movement.
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Lesson 13
Active Transport
Substances must travel into and out of cells for an organism to function. Diffusion, osmosis, and active transport are three processes that contribute to this movement.
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Lesson 14
Practice Questions + Mark Schemes
We have tons of practice questions for you to use alongside the mark scheme!
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2. Organisation
11
Lessons
The hierarchy of complex biological systems and structures is referred to as an organisation. The cell, for example, is thought to be the most basic type of organisation.
Tutorials
- Lesson 1 Principles of Organisation
- Lesson 2 Animal tissues, organs and organ systems
- Lesson 3 The Human Digestive System
- Lesson 4 The Heart and Blood Vessels
- Lesson 5 Blood
- Lesson 6 Coronary Heart Disease
- Lesson 7 Health Issues
- Lesson 8 Plant Tissues, Organs and Systems
- Lesson 9 Plant Tissues
- Lesson 10 Plant Organ System
- Lesson 11 Practice Questions
Lesson 1
Principles of Organisation
Organisms with many levels of an organisation are known as multicellular organisms. All living species are made up of cells, which are the basic building blocks.
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Lesson 2
Animal tissues, organs and organ systems
An organ, such as the heart in animals or a leaf in plants, is made up of two or more tissues that work together to perform a specific function. The nose, trachea, bronchi, and lungs all make up the gas exchange system, which is made up of a group of organs that all work together to fulfill a specific purpose. We will cover topics such as: The Human Digestive System, The Heart and Blood Vessels, Blood, Coronary Heart Disease, Health Issues.
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Lesson 3
The Human Digestive System
An organ, such as the heart in animals or a leaf in plants, is made up of two or more tissues that work together to perform a specific function. The nose, trachea, bronchi, and lungs all make up the gas exchange system, which is made up of a group of organs that all work together to fulfill a specific purpose.
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Lesson 4
The Heart and Blood Vessels
An organ, such as the heart in animals or a leaf in plants, is made up of two or more tissues that work together to perform a specific function. The nose, trachea, bronchi, and lungs all make up the gas exchange system, which is made up of a group of organs that all work together to fulfill a specific purpose.
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Lesson 5
Blood
An organ, such as the heart in animals or a leaf in plants, is made up of two or more tissues that work together to perform a specific function. The nose, trachea, bronchi, and lungs all make up the gas exchange system, which is made up of a group of organs that all work together to fulfill a specific purpose.
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Lesson 6
Coronary Heart Disease
An organ, such as the heart in animals or a leaf in plants, is made up of two or more tissues that work together to perform a specific function. The nose, trachea, bronchi, and lungs all make up the gas exchange system, which is made up of a group of organs that all work together to fulfill a specific purpose.
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Lesson 7
Health Issues
An organ, such as the heart in animals or a leaf in plants, is made up of two or more tissues that work together to perform a specific function. The nose, trachea, bronchi, and lungs all make up the gas exchange system, which is made up of a group of organs that all work together to fulfill a specific purpose.
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Lesson 8
Plant Tissues, Organs and Systems
Plant cells, tissues, and organs have evolved to perform specific tasks. The organ system that transports substances into, around, and out of a plant is made up of the stem, root, and leaves. The leaves are the primary photosynthetic organ. We will cover topics such as: Plant Tissues, Plant Organ System.
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Lesson 9
Plant Tissues
Plant cells, tissues, and organs have evolved to perform specific tasks. The organ system that transports substances into, around, and out of a plant is made up of the stem, root, and leaves.
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Lesson 10
Plant Organ System
Plant cells, tissues, and organs have evolved to perform specific tasks. The organ system that transports substances into, around, and out of a plant is made up of the stem, root, and leaves.
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Lesson 11
Practice Questions
We have tons of practice questions for you to use alongside the mark scheme!
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3. Infection & Response
12
Lessons
When you are infected, your immune system goes into overdrive. White blood cells, antibodies, and other processes work to eliminate the foreign invader from your body.
Tutorials
- Lesson 1 Communicable Diseases
- Lesson 2 Communicable (infectious) diseases
- Lesson 3 Viral diseases
- Lesson 4 Bacterial diseases
- Lesson 5 Protist diseases
- Lesson 6 Monoclonal antibodies
- Lesson 7 Producing monoclonal antibodies
- Lesson 8 Uses of monoclonal antibodies
- Lesson 9 Plant disease
- Lesson 10 Detection and identification of plant diseases
- Lesson 11 Plant defence responses
- Lesson 12 Practice Questions
Lesson 1
Communicable Diseases
Infectious diseases, also known as infectious diseases or transmissible diseases, are disorders caused by the infection, presence, and proliferation of pathogenic (disease-causing) biologic agents in a single human or animal host. We will cover topics such as: Communicable (infectious) diseases, Viral diseases, Bacterial diseases, Fungal diseases, Protist diseases, Human defence systems, Vaccination, Antibiotics and painkillers, Discovery and development of drugs.
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Lesson 2
Communicable (infectious) diseases
Infectious diseases, also known as infectious diseases or transmissible diseases, are disorders caused by the infection, presence, and proliferation of pathogenic (disease-causing) biologic agents in a single human or animal host.
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Lesson 3
Viral diseases
Infectious diseases, also known as infectious diseases or transmissible diseases, are disorders caused by the infection, presence, and proliferation of pathogenic (disease-causing) biologic agents in a single human or animal host.
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Lesson 4
Bacterial diseases
Infectious diseases, also known as infectious diseases or transmissible diseases, are disorders caused by the infection, presence, and proliferation of pathogenic (disease-causing) biologic agents in a single human or animal host.
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Lesson 5
Protist diseases
Infectious diseases, also known as infectious diseases or transmissible diseases, are disorders caused by the infection, presence, and proliferation of pathogenic (disease-causing) biologic agents in a single human or animal host.
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Lesson 6
Monoclonal antibodies
Monoclonal antibodies are duplicates of a single antibody type. Antibodies are proteins generated by lymphocytes, a kind of white blood cell. Antigens are proteins found on the surface of pathogens. We will cover topics such as: Producing monoclonal antibodies, Uses of monoclonal antibodies.
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Lesson 7
Producing monoclonal antibodies
Monoclonal antibodies are duplicates of a single antibody type. Antibodies are proteins generated by lymphocytes, a kind of white blood cell. Antigens are proteins found on the surface of pathogens.
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Lesson 8
Uses of monoclonal antibodies
Monoclonal antibodies are duplicates of a single antibody type. Antibodies are proteins generated by lymphocytes, a kind of white blood cell. Antigens are proteins found on the surface of pathogens.
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Lesson 9
Plant disease
Pathogens are viruses, bacteria, fungus, or protists that cause disease in both plants and animals. In order to protect themselves against diseases, plants have both physical and chemical defences. We will cover topics such as: Detection and identification of plant diseases, Plant defence responses.
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Lesson 10
Detection and identification of plant diseases
Pathogens are viruses, bacteria, fungus, or protists that cause disease in both plants and animals. In order to protect themselves against diseases, plants have both physical and chemical defences.
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Lesson 11
Plant defence responses
Pathogens are viruses, bacteria, fungus, or protists that cause disease in both plants and animals. In order to protect themselves against diseases, plants have both physical and chemical defences.
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Lesson 12
Practice Questions
We have tons of practice questions for you to use alongside the mark scheme!
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4. Bioenergetics
8
Lessons
Bioenergetics is a discipline of biology that studies how cells convert energy, most commonly through the production, storage, or consumption of adenosine triphosphate (ATP). Most components of cellular metabolism, and thus life itself, rely on bioenergetic activities such cellular respiration and photosynthesis.
Tutorials
- Lesson 1 Photosynthesis
- Lesson 2 Photosynthetic reaction
- Lesson 3 Rate of photosynthesis
- Lesson 4 Uses of glucose from photosynthesis
- Lesson 5 Respiration
- Lesson 6 Aerobic respiration
- Lesson 7 Anaerobic respiration
- Lesson 8 Practice Questions + Mark Schemes
Lesson 1
Photosynthesis
The chemical shift that occurs in the leaves of green plants is known as photosynthesis. It is the initial step in the process of preparing meals. We will cover topics such as: Photosynthetic reaction, Rate of photosynthesis, Uses of glucose from photosynthesis.
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Lesson 2
Photosynthetic reaction
The chemical shift that occurs in the leaves of green plants is known as photosynthesis. It is the initial step in the process of preparing meals.
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Lesson 3
Rate of photosynthesis
The chemical shift that occurs in the leaves of green plants is known as photosynthesis. It is the initial step in the process of preparing meals.
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Lesson 4
Uses of glucose from photosynthesis
The chemical shift that occurs in the leaves of green plants is known as photosynthesis. It is the initial step in the process of preparing meals.
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Lesson 5
Respiration
Respiration is a chemical reaction that takes place in each cell of an organism. When food is broken down, energy is released (glucose). To fully decompose, respiration necessitates the presence of oxygen. We will cover topics such as: Aerobic and anaerobic respiration.
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Lesson 6
Aerobic respiration
Respiration is a chemical reaction that takes place in each cell of an organism. When food is broken down, energy is released (glucose). To fully decompose, respiration necessitates the presence of oxygen.
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Lesson 7
Anaerobic respiration
Respiration is a chemical reaction that takes place in each cell of an organism. When food is broken down, energy is released (glucose). To fully decompose, respiration necessitates the presence of oxygen.
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Lesson 8
Practice Questions + Mark Schemes
We have tons of practice questions for you to use alongside the mark scheme!
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5. Homeostasis and Response
12
Lessons
The regulation of a consistent internal environment is known as homeostasis. The conditions are kept in place to guarantee that metabolism and changes in response to both internal and external disturbances run smoothly.
Tutorials
- Lesson 1 Homeostasis and Response
- Lesson 2 The Human Nervous System
- Lesson 3 Structure and function
- Lesson 4 The brain (biology only)
- Lesson 5 The eye (biology only)
- Lesson 6 Control of body temperature (biology only)
- Lesson 7 Hormonal coordination in humans
- Lesson 8 Human endocrine system
- Lesson 9 Control of Blood Glucose
- Lesson 10 Plant hormones (biology only)
- Lesson 11 Control and coordination
- Lesson 12 Practice Questions
Lesson 1
Homeostasis and Response
The regulation of a consistent internal environment is known as homeostasis. The conditions are kept in place to guarantee that metabolism and changes in response to both internal and external disturbances run smoothly.
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Lesson 2
The Human Nervous System
The central nervous system, which includes the brain and spinal cord, is made up of the nervous system (CNS). We will cover topics such as: Structure and function, The brain (biology only), The eye (biology only), Control of body temperature (biology only).
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Lesson 3
Structure and function
The central nervous system, which includes the brain and spinal cord, is made up of the nervous system (CNS).
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Lesson 4
The brain (biology only)
The central nervous system, which includes the brain and spinal cord, is made up of the nervous system (CNS).
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Lesson 5
The eye (biology only)
The central nervous system, which includes the brain and spinal cord, is made up of the nervous system (CNS).
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Lesson 6
Control of body temperature (biology only)
The central nervous system, which includes the brain and spinal cord, is made up of the nervous system (CNS).
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Lesson 7
Hormonal coordination in humans
Hormones are produced by the endocrine glands and provide chemical coordination and control for the body. The pituitary gland, a small but powerful endocrine gland located in the brain, coordinates and controls many endocrine glands throughout the body. We will cover topics such as: Human endocrine system, Control of Blood Glucose, Maintaining water and nitrogen balance in the body (biology only), Hormones in human reproduction.
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Lesson 8
Human endocrine system
Hormones are produced by the endocrine glands and provide chemical coordination and control for the body. The pituitary gland, a small but powerful endocrine gland located in the brain, coordinates and controls many endocrine glands throughout the body.
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Lesson 9
Control of Blood Glucose
Hormones are produced by the endocrine glands and provide chemical coordination and control for the body. The pituitary gland, a small but powerful endocrine gland located in the brain, coordinates and controls many endocrine glands throughout the body.
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Lesson 10
Plant hormones (biology only)
Auxins are a hormone family found in plants. Auxins are produced mostly in the tips of shoots and roots, although they can spread to other areas of the shoots or roots. They govern the length of plant cells by altering the rate of elongation. We will cover topics such as: Control and coordination, Use of plant hormones (HT only).
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Lesson 11
Control and coordination
Auxins are a hormone family found in plants. Auxins are produced mostly in the tips of shoots and roots, although they can spread to other areas of the shoots or roots. They govern the length of plant cells by altering the rate of elongation.
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Lesson 12
Practice Questions
We have tons of practice questions for you to use alongside the mark scheme!
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6. Inheritance and Evolution
10
Lessons
Human blood groups, skin color, and natural eye color are examples of genetic variance. Genetic factors determine whether you have lobed or lobeless ears. Biological sex is also an inherited trait; whether you are male or female is determined by genes passed down from your parents.
Tutorials
- Lesson 1 Reproduction
- Lesson 2 Sexual and asexual reproduction
- Lesson 3 Meiosis
- Lesson 4 DNA and the genome
- Lesson 5 Variation and Evolution
- Lesson 6 Variation + Evolution + Selective breeding
- Lesson 7 Genetic engineering
- Lesson 8 The development of understanding of genetics and evolution
- Lesson 9 Theory of evolution (biology only)
- Lesson 10 Classification of Living Organisms
Lesson 1
Reproduction
The creation of offspring is referred to as reproduction. There are two types of reproduction: sexual and asexual. We will cover topics such as: Sexual and asexual reproduction, Meiosis, Advantages and disadvantages of sexual and asexual reproduction (biology only), DNA and the genome, DNA structure (biology only), Genetic inheritance, Inherited disorders, Sex determination.
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Lesson 2
Sexual and asexual reproduction
The creation of offspring is referred to as reproduction. There are two types of reproduction: sexual and asexual.
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Lesson 3
Meiosis
The creation of offspring is referred to as reproduction. There are two types of reproduction: sexual and asexual.
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Lesson 4
DNA and the genome
The creation of offspring is referred to as reproduction. There are two types of reproduction: sexual and asexual.
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Lesson 5
Variation and Evolution
Individuals in a population are frequently similar but not identical to one another. Some variety within a species is genetic, while others is environmental - the environment in which they have evolved - and still others are a blend of the two. We will cover topics such as: Variation, Evolution, Selective breeding, Genetic engineering, Cloning (biology only).
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Lesson 6
Variation + Evolution + Selective breeding
Individuals in a population are frequently similar but not identical to one another. Some variety within a species is genetic, while others is environmental - the environment in which they have evolved - and still others are a blend of the two.
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Lesson 7
Genetic engineering
Individuals in a population are frequently similar but not identical to one another. Some variety within a species is genetic, while others is environmental - the environment in which they have evolved - and still others are a blend of the two.
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Lesson 8
The development of understanding of genetics and evolution
Simply put, Darwin's hypothesis states that individuals within a species exhibit a wide range of variation due to genetic variances. We will cover topics such as: Theory of evolution (biology only), Speciation (biology only), The understanding of genetics (biology only), Evidence for evolution, Fossils, Extinction, Resistant bacteria.
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Lesson 9
Theory of evolution (biology only)
Simply put, Darwin's hypothesis states that individuals within a species exhibit a wide range of variation due to genetic variances.
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Lesson 10
Classification of Living Organisms
Classification, or taxonomy, is a system of categorising living things. There are seven divisions in the system: (1) Kingdom; (2) Phylum or Division; (3) Class; (4) Order; (5) Family; (6) Genus; (7) Species. Kingdom is the broadest division.
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Ecology is the scientific study of the distribution and abundance of organisms, as well as their interactions with one another and with their abiotic environment.
Tutorials
- Lesson 1 Adaptations, interdependence and competition
- Lesson 2 Communities
- Lesson 3 Abiotic factors+ Biotic factors
- Lesson 4 Adaptations
- Lesson 5 Organisation of an ecosystem
- Lesson 6 Levels of organisation
- Lesson 7 How materials are cycled
- Lesson 8 Decomposition (biology only)
- Lesson 9 Biodiversity
- Lesson 10 Trophic levels in an ecosystem (biology only)
- Lesson 11 Trophic levels
- Lesson 12 Food production
Lesson 1
Adaptations, interdependence and competition
Interdependence. In an ecosystem, all organisms are dependent on each other. If the population of one creature rises or falls, it can have an impact on the ecosystem as a whole. We will cover topics such as: Communities, Abiotic factors, Biotic factors, Adaptations.
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Lesson 2
Communities
Interdependence. In an ecosystem, all organisms are dependent on each other. If the population of one creature rises or falls, it can have an impact on the ecosystem as a whole.
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Lesson 3
Abiotic factors+ Biotic factors
Interdependence. In an ecosystem, all organisms are dependent on each other. If the population of one creature rises or falls, it can have an impact on the ecosystem as a whole.
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Lesson 4
Adaptations
Interdependence. In an ecosystem, all organisms are dependent on each other. If the population of one creature rises or falls, it can have an impact on the ecosystem as a whole.
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Lesson 5
Organisation of an ecosystem
The ecological organisation is divided into four layers. Individual organisms are the starting point, followed by populations, communities, and finally the entire ecosystem. We will cover topics such as: Levels of organisation, How materials are cycled, Decomposition (biology only), Impact of environmental change (biology only) (HT only).
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Lesson 6
Levels of organisation
The ecological organisation is divided into four layers. Individual organisms are the starting point, followed by populations, communities, and finally the entire ecosystem.
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Lesson 7
How materials are cycled
The ecological organisation is divided into four layers. Individual organisms are the starting point, followed by populations, communities, and finally the entire ecosystem.
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Lesson 8
Decomposition (biology only)
The ecological organisation is divided into four layers. Individual organisms are the starting point, followed by populations, communities, and finally the entire ecosystem.
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Lesson 9
Biodiversity
Biodiversity-rich ecosystems are more stable because they can easily adapt to changes. We are gradually learning that preserving great biodiversity is critical to the survival of our species on Earth. Biodiversity-rich ecosystems contribute to provide the resources required to support life, including human existence. We will cover topics such as: Biodiversity, Waste management, Land use, Deforestation, Global warming, Maintaining biodiversity.
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Lesson 10
Trophic levels in an ecosystem (biology only)
A simple food chain is: algae → mosquito larvae → dragon fly larvae → perch. A food web can be created by combining all of the different food chains in an ecosystem. Trophic levels are the phases of a food chain or web. We will cover topics such as: Trophic levels, Pyramids of biomass, Transfer of biomass.
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Lesson 11
Trophic levels
A simple food chain is: algae → mosquito larvae → dragon fly larvae → perch. A food web can be created by combining all of the different food chains in an ecosystem.
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Lesson 12
Food production
Food production efficiency can be increased by limiting energy transfer from food animals to the environment. This can be accomplished by restricting their movement and regulating the temperature of their environment. We will cover topics such as: Factors affecting food security, Farming techniques, Sustainable fisheries, Role of biotechnology.
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Laurence S
