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Understanding Meiosis: The Key to Genetic Diversity
This video explains the process of meiosis, which is essential for sexual reproduction. It details how cells undergo two rounds of division to produce four genetically diverse sex cells with only half the number of chromosomes. Through...
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BIOLOGY - Environment - What is an ecosystem
In this video you'll learn all about ecosystems and how energy is transferred between organisms living together it the same environment.
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BIOLOGY - Environment - Interactions within ecosystem
Ecosystems are large, often highly complex areas of our environment. In this video we learn how abiotic and biotic factors interact with one another in a ecosystem, how trophic levels work, and how various factors in an ecosystem lead to...
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What Are Vaccinations?
Vaccinations protect both humans and animals from a wide range of preventable and potentially serious illnesses. With vaccines, we take advantage of one of the most important aspects of the immune system: the ability to develop...
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What Is Avogadro's Number - The Mole
Learn the basics about Avogadro's Number, as a part of chemical calculations. Avogadro’s Number or the Avogadro Constant is 6.02 X 1023 Mol-1. It is the number of atoms per mole of the carbon-12 isotope. For atoms, the mass of Avogadro’s...
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Avogadro's Number - The Mole
Learn the basics about Avogadro's number - The Mole. What is Avogrado's number? Why is it called like that and what relation does it have to the mole? Find more in this video!
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Minerals and Ores
Learn the basics about Minerals and Ores from a perspective of the Chemical Sciences.
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Minerals & Ores & The Extraction Of Minerals
Learn the basics about Minerals and Ores from a perspective of the Chemical Sciences.
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What Are Catalytic Converters
Learn the basics about catalytic converters, as a part of the overall environmental chemistry topic. A catalyst is a substance that causes a reaction to proceed more quickly, without being used up. A catalytic converter accelerates a...
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Discovery and Development of Drugs
What is a drug? You can pause the video here and have a think, see if you know the names of any drugs. A drug is a substance that when released into the body will cause an effect. Drugs may be recreational, where people choose to take...
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Virus Life Cycle
In this video we are going to look at what happens when a virus invades a host cell. You should already have an understanding of what viruses are.
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Cholera
Over 100,000 people die from cholera. Each year. And yet with treatment, at least 99% would survive. So what is cholera, and why are people still dying from it if it can be treated?
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Bacterial Disease
Did you know that it wasn’t until around 200 years ago that people knew what caused infectious diseases? Before that, they believed that one cause was ‘bad air’, and so they carried around bunches of sweet-smelling flowers to sweeten the...
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What Are Metallic Bonds?
Learn the basics about particles in a metal, that are held together by metallic bonds.What are metallic bonds? Find out more in this video!
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Biological Molecules
Molecules make you think of chemistry, right? Well, they also are very important in biology too. In this video we are going to look at carbohydrates, proteins and lipids. When I say lipids, I am talking about fats and oils. Life...
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Plasma
What colour is the liquid flowing through your veins, arteries and capillaries? it’s not blue or red. But technically it’s actually yellow.The blood that you see when you cut yourself looks red because it contains millions of red blood...
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What Are Serial Dilutions
We have already seen what dilutions are, and how to calculate them using the simple M1V1 = M2V2 equation. We are now going to look at serial dilutions. These are just multiple dilutions, and we can still use our same equation. Serial...
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Fungal Diseases
Imagine a world without bananas! It’s a real possibility… a fungal disease is attacking and killing banana trees, and as yet we haven’t found a cure.
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Mycoprotein
Protein is essential for life - we need protein to build muscle tissue, to make enzymes for our metabolic activity, to form the protective layer of our skin, to make DNA… in fact for most processes in our body. There are thought to be...
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Antibiotics
Antibiotics… one of the greatest discoveries of the 20th century. You’ve probably taken them at some point during your life… maybe for a throat or ear infection? About 20 doses of antibiotics are prescribed per 1,000 people every day...
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Penicillin
Penicillin is a type of antibiotic that can be used to treat bacterial infections. Really important - antibiotics can only be used to treat bacterial infections. Penicillin was first discovered in 1928 by a scientist called Alexander...
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What are Antibodies
If this is the first time you have heard about antibodies, you may not know how important they are. Antibodies are one of the warriors inside our body, helping us to fight off nasty, invading particles. They are a type of protein, and...
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What is RNA
DNA is a type of nucleic acid. And in this video we are going to have a quick look at another type; RNA. We have both DNA and RNA in our bodies. We need them both! DNA is the blueprint; it contains all of the instructions for the cell to...
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How The Elements Are Laid Out In The Periodic Table
Learn the basics about How the elements are laid out in the periodic table? Why are they all named and placed that way? Find out more in this video!