Evolution 2 Practice

8. This is required for a virus to reproduce.
10. When many species radiate out from one common ancestor.
11. When a species goes through many slow changes over a long period of time.
12. When 2 or more species evolove together like a race. Ex: flowers and bees/birds
14. These points on a cladogram represent a common ancestor of a group of species.
15. The evolution of a new species
16. Large areas of the world with a similar climate.

1. Environmental changes lead to abrupt changes followed by periods of no change.
2. When the environment pressures populations and selects the best fit to survive and reproduce.
3. Something that helps an organism survive and reproduce in its environment.
4. Viruses and bacteria have this structure in common. Hint: DNA or RNA.
5. Structures that are similar in function but different in structure.
6. This type of evolution starts with a common ancestor and splits into 2 or more species.
7. Structures that are similar in structure but used for different things.
9. This type of evolution takes species that are not closely related and pressures them to look similar.
13. These things are not alive and cannot be cured with antibiotics.