Living Things

3. the basic unit of structure and function in an organism
4. the mistaken idea that living things can arise from nonliving sources
7. organisms with cells that contain nuclei
8. organism that makes their own food
11. organisms whose cells lack a nucleus
14. an instrument that makes small objects look larger
16. a group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce
17. single-celled organism
18. the maintenance of stable internal conditions
19. the process of change that occurs during an organism's life to produce a more complex organism
20. a widely accepted explanation of the relationship between cells and living things

1. the naming system that Linnaeus used
2. the process of grouping things based on their similarities
5. organism composed of many cells that are specialized to do certain tasks
6. an action or change in behavior
9. the scientific study of how living things are classified
10. a dense area in a cell that contains nucleic acids, controls cellular activities
12. organism that cannot make their own food
13. a classification grouping that contains similar, closely related organisms
15. a change in an organism's surroundings that causes the organism to react