1. Biology 105 Asking About Life

2. CHAPTER 1 u The Unity and Diversity of Life

3. Chapter 1 u Bacteria: Enough to Give You an Ulcer u Key Concepts u How Do Biologists Ask Questions?

4. Do Scientists Use the Scientific Method? scientific method

5. How Do Observations Lead to Models? observations, models

6. What Is a Hypothesis? hypothesis

7. Where do hypotheses come from? How do scientists decide if a hypothesis is correct?

8. What Makes a Good Experiment? control groups

9. How Do Scientists Design Experiments? Reductionism

10. What Is a Testable Hypothesis? testable

11. How Do Scientists Evaluate Experiments That Give Varying Results? Statistics

12. What Is Theory? Give Examples.

13. Biologists Ask Many Kinds of Questions?

14. WHAT DO WE KNOW ABOUT LIFE?

15. How Are Organisms Different from One Another? u Eubacteria and Archaea - Bacteria u Eukarya Four Kingdoms –PROTISTA –FUNGI –PLANTAE –ANIMALIA

16. HOMEOSTASIS AND NEGATIVE FEEDBACK BOX 1-2

17. How Are Organisms Alike? u ORGANIZED PARTS u PERFORM CHEMICAL REACTIONS u OBTAIN ENERGY FROM THEIR SURROUNDINGS u CHANGE u RESPOND TO THEIR ENVIRONMENT u REPRODUCE u COMMON EVOLUTIONARY HISTORY

18. How Can We Tell If Something Is Alive? u Living organisms share many individual traits with nonliving things. u Only living organisms share a common ancestry.

19. Organisms Are Made of Cells u EUKARYOTIC u TRUE CELLS u HAVE A NUCLEUS u ORGANELLES mitochondria u PROKARYOTIC u ARCHAIC CELLS u NO NUCLEUS u NO MEMBRANE ORGANELLES u EX. - BACTERIA

20. How do living organisms replace worn-out parts? A multicellular organism can lose and replace individual cells.

21. How much do organisms resemble one another chemically? SUGARS AMINO ACIDS LIPIDS NUCLEOTIDES

22. Why Do Children Look Like Their Parents? Genes ensure continuity from generation to generation.

23. What are genes made of? DNA NUCLEOTIDES

24. What creates variations from one generation to the next? Mutations

25. What determines the characteristics of an individual? PHENOTYPE

26. How Do Organisms Become Different from One Another? Common ancestry Every species has a unique set of adaptations to the environment.

27. How Do We Know That the Diversity of Life Resulted from Evolution? The fossil record.

28. CHARLES DARWIN u Evolution through natural selection u H. M. S. Beagle u He read several books. u Collections from his grandfather u Fossil record u common traits in animals u embryology u selective breeding

29. The Origin of Species Natural selection over a very long period of time.

30. How are traits passed from one generation to the next? Gregor Mendel formulated the laws of heredity.