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  • Biology Factsheet: 271. The myth of junk DNA

    Biology Factsheet: 271. The myth of junk DNA

    The Human Genome Project sequenced the 3 billion “letters” or bases (A,C,T,G) that make up the genome. Until recently, scientists believed that most of the genes in our bodies didn’t...

    Price £3.00more info
  • Biology Factsheet: 272. Artificial hearts and heart transplants

    Biology Factsheet: 272. Artificial hearts and heart transplants

    A heart transplant involves removing a person’s diseased heartand replacing it with a healthy heart from a deceased donor. It is often the last resort to try to save a person’s life.This F...

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  • Biology Factsheet: 273. Ethical issues in Biology: Assisted fertility

    Biology Factsheet: 273. Ethical issues in Biology: Assisted fertility

    In Britain, approximately one in seven couples experience fertilitydifficulties. About two thirds of these are caused by problems withthe female and one third are caused by the male.This Factsheet:&bu...

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  • Biology Factsheet: 274. Lemming population cycles & climate change

    Biology Factsheet: 274. Lemming population cycles & climate change

    Lemmings are small mammals that live in the Arctic. Their main predators are stoats, which feed almostexclusively on lemmings but other predators include snowy owls, arctic foxes and long-tailed skuas...

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  • Biology Factsheet: 275. The Founder effect, genetic drift & bottlenecks

    Biology Factsheet: 275. The Founder effect, genetic drift & bottlenecks

    This Factsheet:• Explains the concepts of genetic drift, genetic bottlenecks and the founder effect• Illustrates each concept with real examples• Reviews recent exam questions on these ...

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  • Biology Factsheet: 276. Should we cull the Geese?

    Biology Factsheet: 276. Should we cull the Geese?

    This Factsheet:• Discusses the case for and against culling geese• Discusses why some geese populations are increasing butothers are in decline• Reviews recent exam questions on bird co...

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  • Biology Factsheet: 277. Project frozen dumbo: elephant sperm banks

    Biology Factsheet: 277. Project frozen dumbo: elephant sperm banks

    Zoos remain controversial amongst some conservationists. Somebelieve that they are cruel and should be closed and that the moneysaved should be used to protect species in their natural habitats.Others...

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  • Biology Factsheet: 278. Enzymes and activation energy

    Biology Factsheet: 278. Enzymes and activation energy

    This Factsheet:• Explains the concept of activation energy• Outlines the advantages of using enzymes in industrial processes• Provides examples of the use of enzymes in industrial proce...

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  • Biology Factsheet: 279. Is Earth the only living planet?

    Biology Factsheet: 279. Is Earth the only living planet?

    This Factsheet:• Describes the composition of Earth’s early atmosphere• Explains how life changed Earth’s atmosphere• Discusses the possibility of life on Venus and Mars...

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  • Chemistry Factsheet: 178. Inorganic Reaction Trends

    Chemistry Factsheet: 178. Inorganic Reaction Trends

    The importance of reaction trends in chemistry cannot be overstated. In 1869 Dmitri Ivanovich Mendeleev (1834-1907) published his periodic table of the elements. He did this when only some sixty-odd e...

    Price £3.00more info
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