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  • Biology Factsheet: 83. Chromatography and its uses in biology

    Biology Factsheet: 83. Chromatography and its uses in biology

    After studying this Factsheet the student should understand:  • the principles and method of simple paper chromatography  • the range of chromatographic methods available  ...

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  • Biology Factsheet: 84. Xerophytes and hydrophytes

    Biology Factsheet: 84. Xerophytes and hydrophytes

    Xerophytes are plants which are morphologically adapted to dry conditions  i.e. arid or semi arid environments. It is wrong to say that all xerophytes  prefer dry conditions - many grow be...

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  • Biology Factsheet: 85. The paired t-test & when to use it

    Biology Factsheet: 85. The paired t-test & when to use it

    The t-test is widely used within  project  work. This Factsheet will tell you when and how to use the paired t-test. Questions using the  t-test may occur on exam papers, but you will ...

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  • Biology Factsheet: 86. The human genome project (HGP)

    Biology Factsheet: 86. The human genome project (HGP)

    The genome is the collective name for all the genes in the basic set of chromosomes of an individual, including the gene positions and  sequences on the chromosomes  and the base sequences ...

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  • Biology Factsheet: 87. The biology of fertilizers

    Biology Factsheet: 87. The biology of fertilizers

    This Factsheet covers the following areas of A-level syllabuses  and specifications:  • the need for fertilizers.  • types of fertilizers and their use.  • the e...

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  • Biology Factsheet: 88. The biology of pesticides

    Biology Factsheet: 88. The biology of pesticides

    This Factsheet covers the following topic areas relevant to students of AS/A2 level Biology:  • the need for pesticide use.  • the chemical nature of some pesticides and their ac...

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  • Biology Factsheet: 89. Tissue fluid

    Biology Factsheet: 89. Tissue fluid

    After studying this Factsheet the student should know and understand:  • the nature of tissue fluid and lymph  • the functions of tissue fluid  • the formation and dra...

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  • Biology Factsheet: 90. Answering questions on nutrient cycles

    Biology Factsheet: 90. Answering questions on nutrient cycles

    This Factsheet summarises the facts and concepts that are commonly tested on AS and A2 papers....

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  • Biology Factsheet: 91. Taxonomy and Classification

    Biology Factsheet: 91. Taxonomy and Classification

     By studying this Factsheet the student should gain:  • an understanding of the need for classification of organisms and the methods involved in classification.  • the abili...

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  • Biology Factsheet: 92. Isolation Mechanisms

    Biology Factsheet: 92. Isolation Mechanisms

    This Factsheet will explain:  • the nature of isolation mechanisms, including both pre-zygotic  and post-zygotic types;  • some roles and actions of isolation mechanisms in...

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