Genes Reactions Y8

1. The term used to describe the shape of DNA.
4. The scientific word used for burning.
7. Animal DNA including sperm and eggs are stored in a __________ __________.
9. Humans have 23 pairs (46 total) of these in normal body cells.
10. The term used to describe the substances that start a chemical reaction.
13. ____________________ programs can help preserve animals.
15. When there are no individuals of this species anywhere on Earth an organism is _______________.
18. The gas required to be present for a substance to burn.
19. The type of reaction that takes in energy and gets colder.
20. The _________ of the reactants = the __________ of the products.
22. Plant seeds are stored in a ___________ __________.
23. The type of reaction where a substance changes state e.g. Ice melting
24. Another name for an energy level diagram is a reaction ____________.
26. The process by which organisms adapt to their environment over many years (survival of the fittest).
27. The term used to describe the substances that are made in a chemical reaction.
29. The word to describe the variety of organisms on earth, or an ecosystem.
30. The scientist who wrote "On the Origin of Species"

2. An everyday use of an endothermic reaction.
3. The unit for energy.
5. Two of these versions of genes are required to have this characteristic.
6. There is _________________ between organisms of the same species.
8. A gene codes for a ___________________________.
9. This gas is released during combustion and contributes to global warming.
11. The term for different versions of the same gene.
12. A small section of DNA.
14. The term for an organism at risk of becoming extinct.
16. Coal oil and gas are examples of _____________ ____________.
17. The type of reaction that releases energy and gets warmer.
21. An everyday use of an exothermic reaction.
25. Only one of these version of genes is required to have this characteristic.
28. The type of reaction where a new substance is produced.