1. Life

2. Question How do we know what is alive and what is not?
What are the properties of Life?

3. 1. Order
Living things are highly organized in structure and function.

4. Analyzing a biological structure gives us clues about what it does and how it works

5. Structure and Function are related at all levels
system organism

6. 2. Reproduction
Organisms reproduce their own kind.

7. Life on Earth uses the nucleic acid and code for Heritable Information.

8. 3. Growth & Development
Organisms increase in size and complexity.

9. Growth - increase in size. Development - increase in complexity.
Life - grows by internal changes.

10. 4. Energy Utilization
Organisms take in energy and transform it to do work.

11. Organisms are “open” systems, they must continually take in energy.

12. 5. Response To Environment
Organisms respond to changes or stimuli in their environment.

13. The speed of the response may be “fast” or “slow”.

14. 6. Homeostasis Organisms maintain their internal environment within
tolerable limits.
“homeo” = same
“stasis” = state

15. 7. Evolutionary Adaptation
Organisms change over time as they adapt to their environment.

16. Populations must adapt, move, or die!

17. 8. The Cell Is the “basic unit” of Life

18. 9. Organisms Die