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Unit 5
The final examined unit of the Biology A-level
5.1 Genetic CodeThe genetic code is the set of rules by which information encoded within genetic material (DNA or mRNA sequences) is translated into proteins (see 1.1) by living cells (see 1.2)
5.2 Sexual Reproduction (in Humans) Sexual reproduction produces offspring by the fusion of gametes, resulting in offspring genetically different from the parent or parents
5.3 Sexual reproduction in PlantsMany plants do this too!
5.4 InheritanceNot the practice of passing on property, titles and goods on after the death of an individual, but passing on an individuals genes.
5.5 Variation and EvolutionEvolution is the change in the inherited characteristics of biological populations over successive generations. It only works if there is variation with a population
"Nothing in Biology Makes Sense Except in the Light of Evolution" Dobzhansky
5.6 Application of reproduction and geneticsBiotechnology is the use of living systems and organisms to develop or make useful products
5.7 Energy and EcosystemsAn ecosystem is a community of living organisms (plants, animals and microbes; the biotic components) in conjunction with the non-living (abiotic) components of their environment (things like air, water and mineral soil), interacting as a system
5.8 Influence of Human ActivityWhat have we done?
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