The Cell: The Basic Unit of Life

1. The Cell: The Basic Unit of Life

2. Organism Needs energy, materials from the environment, & living space. Grows, develops, responds to environment, reproduces and has cells. Anything that is living Dogs , cats birds, Insects, moss, trees, bacteria Rocks, water, dirt

3. Grows and Develops Reproduces 4 Characteristics of Living Things Responds to the Environment Organization

4. Needs of Living Things 1. Energy 2. Materials 3. Living Space

5. Almost all of this energy comes form the sun.

6. Bacteria

7. Animals must eat other animals or plant life for energy.

8. Food gives animals the energy to grow and reproduce.

9. They need living space for protection from predators

10. If any of these three thing were missing… …the organism will die.

11. Multi-cellular/Unicellular They consist of ONE cell only. Bacteria & pond organisms They are made of many cells. Frogs & the water lily is only scratching the Surface.

12. Cells were far too small to be seen prior to the invention of the microscope. Robert Hooke gave the cell its name while using the microscope. He was looking at cork under A microscope

13. Anton van Leeuwenhoek He was one of the first to describe the cell. He thought they looked like miniature animals calling them “animalcules”.

14. The Cell Theory 1. Every living is made of one or more cells. 2. Cells carry out the functions needed to support life. 3. Cells come from only other living things.

15. Scientific theory It is a widely accepted explanation of things observed in nature.

16. Louis Pasteur He was a French scientist who showed the Practical use of the cell theory. HOW? He observed (through a microscope) that harmful bacteria was growing in milk causing it to spoil. He created a process (Pasteurization) that killed off this bacteria making milk safe to drink.

17. Spontaneous Generation Bacteria grew from non-living things.

18. Pasteur's Experiment • Two flasks of broth-One is sealed, the other • seal is broken. 2. Let them sit for several days. 3.Sealed Flask is unchanged Unsealed flask becomes cloudy because of bacteria growth. 4. Conclusion- The broth in the unsealed Container clouded because bacteria from the Surroundings was able to get into the broth and grow.

19. Let's Review

20. Boys vs Girls • Boys • Girls

21. Which pair is NOT a characteristic of all living things? • Growing and response to the environment. • reproducing and DNA • Growing and Organized • Reproducing and response to the environment

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23. Which is an example of a unicellular organism? • Virus • Water lily • Fly • Bacteria

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25. Who named the cell? • Pasteur • Van Leeuwenhoek • Hooke • Watson

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27. Where does most of the energy needed by organisms come from? • Plants • The Sun • Plants and Animals • Animals

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29. Where do animals get their energy? • Plants • Other animals • Plants and animals • water

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31. Spontaneous generation is… • Life created from other living things. • Non-living things creating other non-living things. • Non-living things creating living things. • Living things creating non-living things.

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33. A scientific _____ is widely accepted explanation of things observed in nature. • Law • Theory • Hypothesis • Educated guess

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35. Who proved spontaneous generation as untrue? Pasteur Hooke Van Leeuwenhoek Crick

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37. Team MVP