| A | B |
|---|
| Anabolic steroid | performance enhancing drug |
| Regeneration | the replacement of body parts by growing new ones |
| Selective breeding | the artificial selection of individual organisms for breeding based on their desirable characteristics |
| Differentiation | the process by which a cell becomes specialised to perform a particular function |
| Stem cell | an undifferentiated cell which has the potential to develop into a specialised cell |
| Hayflick Limit | limit of how many times a cell can divide by mitosis |
| Cancer cells | these cells have no Hayflick limit |
| Cloning | produce organisms with identical genetic information |
| Dolly the sheep | first cloned mammal |
