Across
- 1. Differences that occur between individuals of a species
- 5. A correlation of data on a graph can be seen by this
- 6. The work of Franklin, Wilkins, Watson and Crick showed that DNA was a joined double one
- 7. Mammals, fish, amphibian, reptiles and birds are all in this class
- 9. A bar chart is used to show this type of variation
- 10. The classification group before species
- 11. The lack of resources can cause this
- 13. Children inherit one set from each parent
- 14. The change in organisms caused by natural selection of the best adapted organism
- 15. The genes are these messages for the cells
Down
- 2. Features which can increase the chance of survival
- 3. Darwin suggested that evolution occurred by the survival of these
- 4. The structure made from DNA
- 8. This can affect what can happen to an individual but it is not genetic
- 11. To avoid confusion and to make sure that each organism is correctly identified, scientists make sure that all living things have been correctly
- 12. Twins from the same fertilised egg