1. The study of life “bio” meaning life “ology” meaning study of
What is BIOLOGY?
The study of life
“bio” meaning life
“ology” meaning study of

2. What is Life?
In class activity
How do you know something is alive?

3. How do you know something is alive?
Develop a list of characteristics that can be used to identify life
Provide evidence supporting these characteristics
Provide examples of living and nonliving

4. What is Life? Temporary condition with various lengths of time
Packaged in different sizes and forms
Characterized by processes and environmental interactions
Carbon Based units known as organisms
Reproduces itself
Consciousness
Living and extinct
Product of evolution
Result of Complex chemical reactions that has diversified and adapted to almost every environment since the formation of Earth over 4.5 billion years. We recognize life by the actions of living things!

5. Characteristics of Life
Define life by listing the characteristics that almost all living creatures share
Organization and Cells
Response to Stimuli
Homeostasis
Metabolism
Growth and Development
Reproduction
Evolution

6. Growth and development Energy processing
Order
Regulation
Growth and development
Energy processing
Figure 1.4B Some important properties of life.
Response to the environment
Reproduction
Evolutionary adaptation

7. Organization
High degree of order within an organism’s internal, external parts and its interaction with the environment

8. Response to stimuli
All organisms respond to environmental stimuli

9. Homeostasis
Regulatory systems that maintain a stable level of internal conditions even thought environmental conditions are constantly changing

10. Metabolism
Organisms take in energy and transform it to perform all of life’s activities.

11. Growth & Development
All living things grow and increase in size from the division and enlargement of cells. Development is the process by which an organism becomes a mature adult, involves cell division & differentiation or specialization.

12. Reproduction
Organisms produce new organisms like themselves, not essential to the survival of the individual organism but essential for the continuation of the species.

13. Evolution
Genetic changes in a population of living organisms through time. These changes have produced a rich diversity of life on Earth

14. ANY QUESTIONS?

15. HOMEWORK ANSWER THIS QUESTION Why is defining life difficult?
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QUIZ ???