AQA

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Topic 7: Genetics, populations, evolution and ecosystems 3.7.1 Inheritance The genotype is the genetic constitution of an organism. All of the alleles that an organism carries on its chromosomes The phenotype is the expression of this genetic constitution and its interaction with the environment. observable characteristics of an organism which the result of the genotype as well as environmental factors There may be many alleles of a single gene.

3.6.1.1 Survival and response Organisms increase their chance of survival by responding to changes in their environment. In flowering plants, specific growth factors move from growing regions to other tissues, where they regulate growth in response to directional stimuli.

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Life depends on continuous transfers of energy. In photosynthesis, light is absorbed by chlorophyll and this is linked to the production of ATP. In respiration, various substances are used as respiratory substrates. The hydrolysis of these respiratory substrates is linked to the production of ATP. In both respiration and photosynthesis, ATP production occurs when protons diffuse down an electrochemical gradient through molecules of the enzyme ATP synthase, embedded in the membranes of cellula...

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A level Chemistry Revision - Kinetics A summary for the kinetics topics

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