chapter 1

2. a group of similar, closely related organisms
6. the condition in which organisms internal environment is kept stable
10. the process of grouping things based on their similarities
12. an organism that provides a source of energy or a suitable environment for a virus to live
13. a tiny non living particle that enters and then reproduces inside a living cell
16. an animal with a backbone
17. made of two or more cells
19. in classification of organisms, the broadest level of organization
20. an animal without a backbone

1. The mistaken idea that living things arise from nonliving things
3. the process of changing over time
4. a eukaryotic organisms that cannot be classified as animals
5. a group of similar cells that preform a specific function
7. a group of similar organisms that can mate with each other and produce offspring
8. a living thing
9. organisms that benefit from living with, on, or in a host
11. single celled organism, also know as prokaryotes that lack a nucleus
14. any change in the environment that can make an organism react
15. the basic unit of structure and function
18. made of one cell