5.10 Understand that plants with desired characteristics can be developed by selective breeding

- Some plants have 6 grains per stem, others have 8 grains and some have 10 grains per stem.
- Farmer harvests grain but 10 grains are for selective breeding
- next generation would increase to 8, 10 and 12 but this time 12 grains per stem would be used for the selective breeding
- rice gradually increases so, the yield increase