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AQA GCSE Core Science and Biology unit 1 (B1). Most videos needed for this unit are covered.

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http://memesvault.com/wp-content/uploads/Cheesy-Biology-Jokes-05.jpg

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- James K :D

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(Yourboy Darwin)

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Biology Notes according to the syllabus and stuff

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Biology Notes according to the syllabus and stuff

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https://igcserevision.wordpress.com/experimental-sciences/biology/

Enjoy, Dasha :)

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http://www.thestudentroom.co.uk/forumdisplay.php?f=85

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Bi-concave shape increases surface area in order to have the ability to absorb more oxygen

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Too hot
When you are hot the following happen (controlled by reflexes);
1. Hairs on skin lie flat (less insulating air trapped)
2. Sweating starts
3. Blood is diverted close to the surface of the skin (more heat radiation)

Too cold
When you are cold the following happen (controlled by reflexes);
1. Hairs on skin stand up (more insulating air trapped)
2. Sweating stops
3. Shivering starts, so muscles respire more, producing more heat
4. Blood is diverted away from the surface of the skin (less heat radiation)

PATTTTTTT

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- James K :D

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www.nus.org.uk/en/advice/endsleigh-insurance/exam-revision-tips

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GMO

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GCSE Biology | Learn Effectively with Education Quizzes

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We've got biofuels and gametes, proteins, stem cells, mitosis, enzymes and a whole lot more. It's basically everything you've ever seen in a Biology textbook reduced into smaller, fun quizzes. Our GCSE Biology teachers know what they are about - and what they are about is efficient revision

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Are you having problems getting pregnant? Then you may wonder if in vitro fertilization (IVF) is right for you. Many women find pregnancy success after trying IVF. If you are ready to learn more, check out the four primary steps you can expect during the in vitro fertilization process.

Step 1: Ovulation Induction
Before and during the in vitro fertilization process, your fertility specialist will monitor your ovaries and the timing of the egg release. The doctor will make sure that your ovaries are producing eggs, and that your hormone levels are normal, among other procedures.

Most women take fertility medicines or hormones at this time to stimulate the ovaries to produce one or more eggs. Having several eggs available for IVF will increase the chances that you will get pregnant.

If you cannot produce any eggs, talk to your doctor about donor eggs for the IVF process.

Step 2: Egg Retrieval
During this step in the IVF process, pain medication is given to reduce any discomfort. Then a very thin needle is passed through the upper vaginal wall. With the use of vaginal ultrasound, fluid is removed from the follicles under gentle suction.

Immediately after aspiration of the follicle, the oocyte (egg) is isolated from the follicular fluid. The egg is placed in a culture dish containing nutrient media and then transferred to the incubator.

Step 3: Fertilization
The next step of the IVF process is the fertilization of the egg. A sperm sample is secured, either from your partner or a donor, and the most active sperm is mixed with the egg in a special chamber. Sometimes the sperm is directly injected into the egg. Then, the sperm and egg are placed in an incubator and monitored to make sure that a healthy embryo develops.

Step 4: Embryo Transfer and Implantation
The final step of the IVF process is the embryo transfer. First, the embryos are examined to select the healthiest ones for transfer. To transfer the embryo(s), a speculum is placed into your vagina and the embryo(s) are transferred via a small plastic tube placed through the cervix into the uterine cavity. After the IVF process is complete, bed rest is often advised for around 24 hours.

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IVF Process: 4 Steps to Getting Pregnant

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Are you having problems getting pregnant? Then you may wonder if in vitro fertilization (IVF) is right for you. Many women find pregnancy success after trying IVF. If you are ready to learn more, check out the four primary steps you can expect during the in vitro fertilization process.

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Cornea - Refracts (bends) light entering the eye.
Iris - Controls the amount of light entering the eye by adjusting the size of the pupil.
Pupil - Hole which allows light into the eye.
Lens - Allows fine focusing by changing shape.
Ciliary muscle - Changes the shape of the lens by altering the tension on the suspensory ligaments.
Retina - Contains light-sensitive rod and cone cells which convert light energy into a nerve impulse (i.e. transduce energy).
Fovea - Area where most light is focused, very sensitive to colour (most cones here).
Optic nerve - Transmits nerve impulses to the brain, where they are interpreted.
Sclera - Outer protective layer of eye
Choroid - Contains blood vessels

PATTTTTTTTTTTT

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Particles (molecules and ions) in a liquid and a gas move continuously. Because of this movement, particles will spread themselves evenly throughout a liquid or a gas.

If there is a situation where particles of a substance are in a higher concentration, they will move from this region to where they are in a lower concentration. This is called .

It is important to remember that the particles:

will move in both directions, but there will be a movement from high to low concentration

will end up evenly spread throughout the liquid or gas, but will continue to move

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Diffusion - Transport in cells - AQA - GCSE Combined Science Revision - AQA Trilogy - BBC Bitesize

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Revise transport in cells for GCSE Combined Science, AQA.

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 representative of the family Phascolarctidae and its closest living relatives are the wombats.

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 representative of the family Phascolarctidae and its closest living relatives are the wombats.

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https://www.quizup.com/en/topics/biology

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https://www.innerbody.com/image/nervov.html
***It is a little too detailed but maybe just use it for visualization!
Dasha :)

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Some drugs are illegal, or must only be prescribed by a doctor. Some prescription drugs are misused and taken for recreational use, rather than for medical reasons. They become illegal under these circumstances.

Illegal drugs are classified from Class A to Class C. Class A drugs are the most dangerous, with the most serious penalties for possession or dealing. Class C are the least dangerous, with the lightest penalties, but this does not mean they are safe to use.

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BBC Bitesize - GCSE Biology (Single Science) - Drugs and the human body - Revision 1

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Some drugs are illegal, or must only be prescribed by a doctor. Some prescription drugs are misused and taken for recreational use, rather than for medical reasons. They become illegal under these circumstances. Illegal drugs are classified from Class A to Class C.

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GCSE Biology Revision - XtremePapers | Advancing knowledge is in our DNA

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Revision resource for students studying their GCSEs and A-Levels featuring high quality revision guides, revision notes and revision questions for a range of subjects.

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https://www.google.co.th/search?q=the+heart+labeled&biw=1280&bih=923&espv=2&tbm=isch&imgil=-KLSVapwq8UqQM%253A%253BbLMPFl7WFtQqpM%253Bhttps%25253A%25252F%25252Fwww.pinterest.com%25252Fpin%25252F246501779574661145%25252F&source=iu&pf=m&fir=-KLSVapwq8UqQM%253A%252CbLMPFl7WFtQqpM%252C_&usg=__LGLajTeoFLX0gsbA1emYlSiOWyU%3D&ved=0ahUKEwjsxPD83snLAhUWBI4KHStbCEwQyjcIJQ&ei=LrLrVuz1NpaIuASrtqHgBA&safe=active&ssui=on#imgrc=-KLSVapwq8UqQM%3A

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http://www.bbc.co.uk/schools/gcsebitesize/science/add_gateway_pre_2011/living/controlplantgrowthrev1.shtml
Dasha :)

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A changing the genetic material of an organism by removing, changing or inserting individual genes.

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GCSE Biology Topics - Pass My Exams: Easy exam revision notes for GSCE Biology

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Comprehensive revision notes for GCSE exams for Physics, Chemistry, Biology

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Link to apps for Biology Games and stuff

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Link to apps for Biology Games and stuff

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http://www.biomanbio.com/
Dasha :)

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Photosynthesis - Photosynthesis - AQA - GCSE Combined Science Revision - AQA Trilogy - BBC Bitesize

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Revise how plants make their own food using photosynthesis for GCSE Combined Science, AQA.

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BBC Bitesize - GCSE Biology (Single Science) - Diet - Revision 1

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Discover how food provides energy and nutrients and how the components of the diet have different sources and functions.

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https://quizlet.com/subject/biology/
Dasha :)

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The animal kingdom contains many phyla. Some of them are:
Vertebrates, Arthropods, Annelids, Molluscs, Nematodes .

It is not always easy to recognise an animal. For a very long time, people thought that's sea anemones were plants, because they tend to stay in one place and their tentacles look rather kike petals. Now we know that they are animals.

One of the best way to tell if an organism is an animal is to look at its cells under the microscope. Animal cells never have cell walls.
Animals are classified into many phyla. Here are just some of these phyla:

Details of each phylum and class are given in the next topics.

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The animal kingdom contains many phyla. Some of them are: Vertebrates, Arthropods, Annelids, Molluscs, Nematodes . It is not always easy to recognise an animal. For a very long time, people thought that's sea anemones were plants, because they tend to stay in one place and their tentacles look rather kike petals.

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This process takes place in stages:

Stage 1: Filtration

Stage 2: Selective reabsorption

Having filtered out small molecules from the blood - many of which are essential to the body - the kidneys must reabsorb the molecules which are needed, while allowing those molecules which are not needed to pass out in the urine. Therefore, the kidneys selectively reabsorb only those molecules which the body needs back in the bloodstream.

The reabsorbed molecules include:

all of the glucose which was originally filtered out

as much water as the body needs to maintain a constant water level in the blood plasma

as many ions as the body needs to maintain a constant balance of water and mineral ions in the blood plasma

Stage 3: The formation of urine

The molecules which are not selectively reabsorbed (the urea and excess water and ions) continue along the nephron tubule as urine . This eventually passes down to the bladder.

In carrying out these processes, the kidney is able to fulfil its functions of regulating the water and ion balance of the blood plasma, as well as keeping the level of urea low.

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BBC - GCSE Bitesize Science - Removal of waste and water control : Revision, Page 3

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This process takes place in stages: Having filtered out small molecules from the blood - many of which are essential to the body - the kidneys must reabsorb the molecules which are needed, while allowing those molecules which are not needed to pass out in the urine.

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This process takes place in stages:

Stage 1: Filtration

Stage 2: Selective reabsorption

Having filtered out small molecules from the blood - many of which are essential to the body - the kidneys must reabsorb the molecules which are needed, while allowing those molecules which are not needed to pass out in the urine. Therefore, the kidneys selectively reabsorb only those molecules which the body needs back in the bloodstream.

The reabsorbed molecules include:

all of the glucose which was originally filtered out

as much water as the body needs to maintain a constant water level in the blood plasma

as many ions as the body needs to maintain a constant balance of water and mineral ions in the blood plasma

Stage 3: The formation of urine

The molecules which are not selectively reabsorbed (the urea and excess water and ions) continue along the nephron tubule as urine . This eventually passes down to the bladder.

In carrying out these processes, the kidney is able to fulfil its functions of regulating the water and ion balance of the blood plasma, as well as keeping the level of urea low.

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BBC - GCSE Bitesize Science - Removal of waste and water control : Revision, Page 3

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This process takes place in stages: Having filtered out small molecules from the blood - many of which are essential to the body - the kidneys must reabsorb the molecules which are needed, while allowing those molecules which are not needed to pass out in the urine.

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Bacteria are useful in biotechnology and genetic engineering due to their rapid reproduction rate and their ability to make complex molecules

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The eye is a sense organ containing receptors sensitive to light intensity and colour.

The retina

Light passes through the eyeball to the retina. There are two main types of light receptors - rods and cones . Rods are more sensitive to light than cones so they are useful for seeing in dim light. There are three different types of cone cells which produce colour vision.

The pupil reflex

The amount of light entering the eye is controlled by a reflex action . The size of the pupil changes in response to bright or dim light. This is controlled by the muscles of the iris .

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BBC Bitesize - GCSE Biology (Single Science) - Co-ordination and control - The nervous system - OCR Gateway - Revision 7

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1 2 3 4 5 6 7 8 9 Page 7of 9 The eye is a sense organ containing receptors sensitive to light intensity and colour. Light passes through the eyeball to the retina. There are two main types of light receptors - rods and cones .

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BBC Bitesize - GCSE Biology (Single Science) - Excretion in plants and animals - Revision 1

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Learn about excretion, the removal of substances from plants, animals and other living organisms with BBC Bitesize GCSE Biology.

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We get these by eating them. They are broken down first and then reassembled into our own carbohydrates, proteins and lipids. This is because:

most of the molecules in food are too large to pass through the absorbing surface of the gut wall

the carbohydrates, proteins and lipids are reassembled in the form required, rather than other animal or plant versions

Carbohydrates

Source of energy, glucose is the main respiratory substrate

Starch: potatoes, rice and wheat products, bread, cereals and pasta. Sugars: fruit, smoothies, fizzy drinks, chocolate and sweets

Energy, make up part of cell membranes so essential for normal growth

Butter and margarine, meat and processed meat, plant oils, oily fish, nuts and seeds

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Molecules of life - Animal organisation - digestion - AQA - GCSE Combined Science Revision - AQA Trilogy - BBC Bitesize

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We get these by eating them. They are broken down first and then reassembled into our own carbohydrates, proteins and lipids.

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HIGH SUGAR = INSULIN(Hormones) FROM PANCREAS = Glucose into Glycogen store in liver.
LOW SUGAR = GLUCAGON FROM PANCREAS = GLYCOGEN IN LIVER into GLUCOSE .

BY: PATTTTT

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GCSE Biology (Single Science) - BBC Bitesize

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GCSE Biology is the study of living organisms and their structure, life-cycles, adaptations and environment.

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http://www.bbc.co.uk/schools/gcsebitesize/science/triple_aqa/homeostasis/removal_waste_water_control/revision/3/

Dasha :)

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Mr Universe

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Edexcel IGCSE Biology Revision Flashcards | Quizlet

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Keywords and definitions for Triple award IGCSE Science (only Biology) Learn with flashcards, games, and more — for free.

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GCSE Science Revision Page 6 - CGP Books

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CGP write and sell great value revision guides and study books for UK schools. The educational books cover A-Level, GCSE, KS3, KS2 and KS1 with subjects such as Maths, Science, History, Geography, French, English and more. Order online!

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http://firefly.bkkprep.ac.th/science/igcse-coordinated-science/past-igcse-exam-papers

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Genes, Chromosomes and DNA revision sheet

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Genes, Chromosomes and DNA revision sheet

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https://www.cgpbooks.co.uk/interactive_gcse_science_page6

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GCSE Science Revision Page 6 - CGP Books

# data[].attributes.attachment_link.description
CGP write and sell great value revision guides and study books for UK schools. The educational books cover A-Level, GCSE, KS3, KS2 and KS1 with subjects such as Maths, Science, History, Geography, French, English and more. Order online!

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Saint George Catholic College Science Department

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What is osmosis? Here is a video for AQA Biology, unit 3 which explains the idea of osmosis and gives some examples of where osmosis is observed. Also useful for OCR, Edexcel.

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The Human Heart - Pass My Exams: Easy exam revision notes for GSCE Biology

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Comprehensive revision notes for GCSE exams for Physics, Chemistry, Biology

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Science resources (not all topics in it are relevant)

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Science resources (not all topics in it are relevant)

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BBC - GCSE Bitesize - AQA Additional Science

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A secondary school revision resource for AQA GCSE Additional Science about biology, chemistry and physics

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Homeostasis and response - GCSE Biology - BBC Bitesize

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GCSE Biology Homeostasis and response learning resources for adults, children, parents and teachers.

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Blood vessel:

white blood cell

red blood cell

platelets

plasma

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Components of Blood, Cardiovascular System - Pass My Exams: Easy exam revision notes for GSCE Biology

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Comprehensive revision notes for GCSE exams for Physics, Chemistry, Biology

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Double Science- revision sheets for most topics

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Double Science- revision sheets for most topics

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The carbon cycle shows how carbon moves from the atmosphere, through various animals and plants, then back into the atmosphere again.

All cells contain carbon compounds such as proteins, fats and carbohydrates. Carbon is passed from the atmosphere, as carbon dioxide, to living things. It is passed from one organism to the next in complex molecules, and returned to the atmosphere as carbon dioxide again.

Removing carbon dioxide from the atmosphere

Green plants and algae remove carbon dioxide from the atmosphere by photosynthesis [ photosynthesis: The chemical change that occurs in the leaves of green plants. It uses light energy to convert carbon dioxide and water into glucose. Oxygen is produced as a by-product of photosynthesis. ] . The carbon becomes part of complex molecules such as proteins, fats and carbohydrates in the plants and algae.

Returning carbon dioxide to the atmosphere

Organisms return carbon dioxide to the atmosphere by respiration [ respiration: Chemical change that takes place inside living cells, which uses glucose and oxygen to produce the energy organisms need to live. Carbon dioxide is a by-product of respiration ] . It is not just animals that respire. Plants, algae and microorganisms do too.

Carbon dioxide is also released into the atmosphere when fossil fuels such as coal and oil, and wood, are burned.

Passing carbon from one organism to the next

When an animal eats a plant, carbon from the plant becomes part of the fats and proteins in the animal. Microorganisms and some animals feed on waste material from animals, and the remains of dead animals and plants. The carbon then becomes part of these microorganisms and detritus feeders.

This slideshow should help you to understand how the cycle works:

Now try a Test Bite

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The carbon cycle shows how carbon moves from the atmosphere, through various animals and plants, then back into the atmosphere again. All cells contain carbon compounds such as proteins, fats and carbohydrates. Carbon is passed from the atmosphere, as carbon dioxide, to living things.

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What are enzymes?

temperature

pH

Mitochondria

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Enzymes are biological catalysts. There are optimum temperatures and pH pH: Scale of acidity/alkalinity. pH below 7 = acidic, pH above 7 = alkaline values at which their activity is greatest. Enzymes are also proteins, and usually denatured above about 45ºC.

Enzymes are important in respiration. Aerobic respiration releases energy from glucose.

Enzymes are biological catalysts - catalysts are substances that increase the rate of chemical reactions without being used up. Enzymes are also proteins proteins: organic compounds made up of amino acid molecules. One of the three main food groups, proteins are needed by the body for cell growth and repair. that are folded into complex shapes that allow smaller molecules to fit into them. The place where these substrate molecules fit is called the active site.

The animation shows how this works. In this example, two small molecules join together to make a larger one.

Your web browser does not have JavaScript switched on at the moment. For information on how to enable JavaScript please go to the Webwise site.

You will not be able to see this content until you have JavaScript switched on.

If the shape of the enzyme changes, its active site may no longer work. We say the enzyme has been denatured denatured: If a protein is denatured, its structure and function is altered. This can be caused by heat, altered pH or by chemical agents.. They can be denatured by high temperatures or extremes of pH pH: Scale of acidity/alkalinity. pH below 7 = acidic, pH above 7 = alkaline. Note that it is wrong to say the enzyme has been killed. Although enzymes are made by living things, they are proteins, and not alive.

Temperature and enzymes

As the temperature increases, so does the rate of reaction. But very high temperatures denature enzymes.

The graph shows the typical change in an enzyme's activity with increasing temperature. The enzyme activity gradually increases with temperature until around 37ºC, or body temperature. Then, as the temperature continues to rise, the rate of reaction falls rapidly, as heat energy denatures the enzyme.

pH and enzymes

Changes in pH alter an enzyme's shape. Different enzymes work best at different pH values. The optimum pH for an enzyme depends on where it normally works. For example, intestinal enzymes have an optimum pH of about 7.5. Enzymes in the stomach have an optimum pH of about 2.

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Enzymes are biological catalysts. There are optimum temperatures and pH pH: Scale of acidity/alkalinity. pH below 7 = acidic, pH above 7 = alkaline values at which their activity is greatest. Enzymes are also proteins, and usually denatured above about 45ºC. Enzymes are important in respiration. Aerobic respiration releases energy from glucose.

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BBC - GCSE Bitesize: Reproduction and cloning activity

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A secondary school revision resource for AQA GCSE Science about evolution, environment, reproduction and cloning