Black bears come to town | Cities: Nature’s New Wild
Black bears come to town to fatten up by eating 20,000 calories a day and get ready for their 6 month hibernation.
Tweet- Clip length: 2'10''
- Broadcast year: 2019
- Biology
Licence: ERA Licence required
UK only
Staff and students of licensed education establishments only
Cannot be adapted
- Provider: BBC
- Channel: BBC Two
- Programme: Cities: Nature's New Wild
- Series: 1
- Episode: Commuters
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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).
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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.