Common ancestor | Evolutionwatch
Similar bone structures in a number of animals may suggest that they are all descended from the same ancestor.
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Selective breeding and the 'Green Revolution' | Botany: A Blooming History
Norman Borlaug used selective breeding techniques to improve wheat production in Mexico. He produced plants which had large seed heads and hence a good yield. However, the plants were too tall and were prone to falling over (lodging).
Selective breeding | Countryfile
For thousands of years we have been selectively breeding farm animals to make them more and more productive. But in recent years there has been growing concern that pushing profitable traits has led to welfare problems.