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DNA: structure, genes and chromosomes
Meiosis, sexual and asexual reproduction
Inheritance and genetic diagrams
Inherited disorders
Types and sources of variation
Evolution by natural selection
Antibiotic resistance: causes and prevention
Selective breeding
Uses and evaluation of genetic engineering
The process of genetic engineering - Higher
Classifying living organisms
Carbon is an important element that makes up living things and it has to be recycled as there is only a fixed amount in the atmosphere.
When animals respire they release carbon dioxide back into the air.
Carbon is passed to animals when they eat plants.
Beta