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1. BBC - GCSE Bitesize - Defending against infection
Pathogens are microorganisms - such as bacteria and viruses - that cause disease. Bacteria release toxins, and viruses damage our cells. White blood cells can ingest and destroy pathogens. They can produce antibodies to destroy pathogens, and antitoxins to neutralise toxins. In vaccination pathogens are introduced into the body in a weakened form. The process causes the body to pro
URL: http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/human/defendingagainstinfectionrev_print.shtml - 21KB - 09 Nov 2008
2. BBC - GCSE Bitesize - Defending against infection
Pathogens are microorganisms - such as bacteria and viruses - that cause disease. Bacteria release toxins, and viruses damage our cells. White blood cells can ingest and destroy pathogens. They can produce antibodies to destroy pathogens, and antitoxins to neutralise toxins. In vaccination pathogens are introduced into the body in a weakened form. The process causes the body to pro
URL: http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/human/defendingagainstinfectionrev3.shtml - 27KB - 09 Nov 2008
3. BBC - GCSE Bitesize - Defending against infection
Pathogens are microorganisms - such as bacteria and viruses - that cause disease. Bacteria release toxins, and viruses damage our cells. White blood cells can ingest and destroy pathogens. They can produce antibodies to destroy pathogens, and antitoxins to neutralise toxins. In vaccination pathogens are introduced into the body in a weakened form. The process causes the body to pro
URL: http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/human/defendingagainstinfectionrev1.shtml - 22KB - 09 Nov 2008
4. BBC - GCSE Bitesize - Defending against infection
Pathogens are microorganisms - such as bacteria and viruses - that cause disease. Bacteria release toxins, and viruses damage our cells. White blood cells can ingest and destroy pathogens. They can produce antibodies to destroy pathogens, and antitoxins to neutralise toxins. In vaccination pathogens are introduced into the body in a weakened form. The process causes the body to pro
URL: http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/human/defendingagainstinfectionrev2.shtml - 23KB - 09 Nov 2008
5. BBC - GCSE Bitesize - Defending against infection
Pathogens are microorganisms - such as bacteria and viruses - that cause disease. Bacteria release toxins, and viruses damage our cells. White blood cells can ingest and destroy pathogens. They can produce antibodies to destroy pathogens, and antitoxins to neutralise toxins. In vaccination pathogens are introduced into the body in a weakened form. The process causes the body to pro
URL: http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/human/defendingagainstinfectionrev4.shtml - 28KB - 09 Nov 2008
6. BBC - GCSE Bitesize - Reproduction and cloning
The genetic information passed from parent to offspring is contained in genes carried by chromosomes in the nucleus. Sexual reproduction produces offspring that resemble their parents, but are not identical to them. Asexual reproduction produces offspring - clones - which are genetically identical to their parents. Plants can be cloned artificially using cuttings or tissue culture.
URL: http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/evolution/reproductionrev_print.shtml - 22KB - 09 Nov 2008
7. BBC - GCSE Bitesize - Defending against infection
Pathogens are microorganisms - such as bacteria and viruses - that cause disease. Bacteria release toxins, and viruses damage our cells. White blood cells can ingest and destroy pathogens. They can produce antibodies to destroy pathogens, and antitoxins to neutralise toxins. In vaccination pathogens are introduced into the body in a weakened form. The process causes the body to pro
URL: http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/human/defendingagainstinfectionrev5.shtml - 26KB - 09 Nov 2008
8. BBC - GCSE Bitesize - Defending against infection
Pathogens are microorganisms - such as bacteria and viruses - that cause disease. Bacteria release toxins, and viruses damage our cells. White blood cells can ingest and destroy pathogens. They can produce antibodies to destroy pathogens, and antitoxins to neutralise toxins. In vaccination pathogens are introduced into the body in a weakened form. The process causes the body to pro
URL: http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/human/defendingagainstinfectionrev6.shtml - 27KB - 09 Nov 2008
9. BBC - GCSE Bitesize - Science | Science (AQA) | Human biology | Index
XSL_formatting http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/human/index.shtml A secondary school revision resource for Science en-gb Mon,...
URL: http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/human/human.xml - 4KB - 20 Aug 2008
10. BBC - GCSE Bitesize - Reproduction and cloning
The genetic information passed from parent to offspring is contained in genes carried by chromosomes in the nucleus. Sexual reproduction produces offspring that resemble their parents, but are not identical to them. Asexual reproduction produces offspring - clones - which are genetically identical to their parents. Plants can be cloned artificially using cuttings or tissue culture.
URL: http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/evolution/reproductionrev6.shtml - 32KB - 09 Nov 2008

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