1. Introduction to Biology

2. What is Biology?

3. Biology is…  Bio = Life  logy = Study (knowledge)  BIOLOGY = The study of living organisms

4. Branches of Biology

5. What makes something living?

6. Tweet your pics to: #BHSBio2515

7.  NS.12.B.4 Relate the development of the cell theory to current trends in cellular biology.  CDL.7.B.6 compare and contrast the structures and characteristics of viruses (lytic and lysogenic cycles) with non-living and living things. Characteristics of Living Things & Cell Theory

8. 1. Made of Cells - Smallest unit of life that can replicate independently.

9. 2. Living things reproduce  Reproduction is not essential for the survival of individual organisms, but must occur for a species to survive.  All living things reproduce in one of the following ways:  Asexual reproduction - Producing offspring without the use of gametes.  Sexual reproduction - Producing offspring by the joining of sex cells.

10. 3. Have DNA – the genetic material for all life.

11. 4. Living things grow & develop  Cell division - the orderly formation of new cells.  Cell enlargement - the increase in size of a cell. Cells grow to a certain size and then divide.  An organism gets larger as the number of its cells increases.

12. 5. Metabolism - Obtain and use materials and Energy

13. 6. Respond to their environment (stimuli)  Living things will make changes in response to a stimulus in their environment.  A behavior is a complex set of responses.  Examples of animal behaviors in response to environment:  Hibernation  Migration  Defense  Courtship

14. 7. Homeostasis  Living things maintain a stable internal environment.  Although conditions outside an organism may change, conditions inside an organism tend to remain constant (stay the same).  This process is called homeostasis.

15. 8. Adapt to their environment  Adaptations are traits giving an organism an advantage in a certain environment.  Variation of individuals is important for a healthy species.

16. Living or non-living?

17. Bacteria

18. Sun

19. Bed bug

20. Mold

21. Dirt

22. Hair

23. Viruses: How are they different?

24. Common Core Activity on Viruses Research Question Claim Evidence Justification

25. Life is Cellular  Since the 1600s, scientists have made many discoveries about the cells of living things. These discoveries are summarized in the cell theory. Robert Hooke was the first to describe a cell using a piece of cork and an early compound microscope. German botanist, Schleiden, concluded all plants were made of cells and German biologist, Schwann. said that all animals are made of cells.  Start at 36:00 http://quietube6.com/v.php/http://www.yout ube.com/watch?v=AgOMnVlEWTY http://quietube6.com/v.php/http://www.yout ube.com/watch?v=AgOMnVlEWTY NS. 12.B.4 Relate the development of the cell theory to current trends in cellular biology.

26. The Cell Theory States: The classical cell theory states:  All living things are made up of cells.  Cells are the basic units of structure and function in living things.  New cells are produced from existing cells.

27. The Modern Cell Theory States:  The modern version of the Cell Theory includes the ideas that: Energy flow occurs within cells. Heredity information (DNA) is passed on from cell to cell.  All cells have the same basic chemical composition.

28. All cells share two common things: All cells share two characteristics:  a barrier called a cell membrane that surrounds the cell, and  at some point in their lives they contain DNA or RNA. Nucleic acids are the molecules that carry heredity information.

29. Technology used to study cells  Today scientists used advanced microscopes such as TEM (tunneling electron microscope) and SEM (scanning electron microscope) to see inside of cells. (p. 26)  Scientists also have many advanced techniques to study cells. They can measure the production of cellular chemicals to see how these provide energy and building materials for the cells. New technology in cell studies lead to many new discoveries about cells.

30. Electron Microscope  Capable of revealing details as much as 1000x smaller than those visible in light microscopes  Transmission Electron Microscopes (TEMs) make it possible to see protein molecules  Scanning Electron Microscopes (SEMs) produce 3-D images

31. Electron Microscope

32. Time for the white board!  In your table groups, make a list of living things and non-living things. LIVING THINGSNON-LIVING THINGS

33. What are some of the non- living things on this picture? ROCKS WATER SOIL LEAVES MOSS

34. How do you know when something is a living organism?  Individually on a piece of paper write down how do you know when something is living or non-living. This will be your exit ticket.