2. Everyone is a Biologist !

3. Today: Four Questions What are the Characteristics of Life? How diverse is life? How do we study the natural world? Who are some of the key people who played a role in the history of biology?

4. What are the Characteristics of Life? All living things exhibit five characteristics in combination.

5. What are the Characteristics of Life?

6. ATOM MOLECULE ORGANELLE CELL TISSUE ORGAN ORGAN SYSTEM MULTICELLULAR ORGANISM

7. What are the Characteristics of Life?

8. Each level of biological organization exhibits emergent properties. Ex. Capillaries transport blood (property not exhibited by individual endothelial cells).

9. What are the Characteristics of Life? Energy Use & Metabolism Metabolism - biochemical reactions that acquire & use energy. Why do organisms need energy? How do organisms obtain energy?

10. What are the Characteristics of Life?

11. Maintenance of Homeostasis Homeostasis - the ability of an organism to maintain its internal environment despite conditions in the external environment. Human body temperature is……… F if body temperature rises, you sweat. F if body temperature lowers, you shiver.

12. What are the Characteristics of Life? Reproduction, Growth & Development Asexual reproduction - involves a single parent; progeny are genetically identical to the parent. Sexual reproduction - involves 2 parents; progeny are genetically diverse. Is it essential for an individual to reproduce?

13. What are the Characteristics of Life? Irritability & Adaptation Irritability - immediate response to a stimulus.

14. What are the Characteristics of Life? Irritability & Adaptation Adaptation - an inherited behavior or characteristic that enables an organism to survive & reproduce. Over time, adaptations are modified by natural selection.

15. What are the Characteristics of Life? Life is always changing….. On the level of DNA…… Change = Evolution Evolution is the backbone of biology.

16. Life is Diverse Biodiversity refers to the many different types of organisms on earth. Taxonomy is the biological science that classifies life according to evolutionary relationships. The Domain is the largest group of organisms.

17. Life is Diverse

18. Kingdom Phylum Class Order Family Genus Species Kings Play Chess On Funny Green Squares

19. Life is Diverse Human classification scheme: DomainEukarya Kingdom Animalia Phylum Chordata ClassMammalia Order Primates Family Hominidae Genus & species Homo sapiens

20. How do we study the Natural World? What is the Scientific Method? Methodical exploration What makes science unique!

21. How do we study the Natural World? Question Hypothesis Prediction Observations Now What???

22. How do we study the Natural World? Question Hypothesis Prediction Observations Experiment

23. How do we study the Natural World?

24. After you perform your experiment, you need to analyze the generated data. Does the data support or not support your hypothesis? If your data does not support the hypothesis then…… If your data does support your hypothesis……..

25. How do we study the Natural World? What is difference between hypothesis, theory & law? Hypothesis - “an educated guess”; a tentative explanation of phenomena. Theory - a widely accepted explanation of natural phenomena; has stood up to thorough & continual testing. Law - a statement of what always occurs under certain conditions.

26. How do we study the Natural World? How is a control group different from an experimental group?

27. History of Biology

28. Microbiology

29. Cell Biology

30. Cell Theory

31. Genetics

32. Theory of Evolution by Natural Selection

33. DNA