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Cell Theory: Exploring the Basic Units of Life

Discover the fascinating world of cells and their significance in the study of life. Learn about the three components of the cell theory and the contributions of important scientists throughout history.

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Cell Theory: Exploring the Basic Units of Life

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  1. Do Now Complete the preview quiz on the top of your page.

  2. Do Now False; there are more than 100 TRILLION (100,000,000,000) 1. There are approximately 10 billion cells in the human body. 2. You have billions of bacteria inside your body right now. 3. Cells are about the size of atoms. 4. It is unhealthy to eat food containing microorganisms (microscopic living things). 5. Microorganisms cannot live in extreme heat or cold. True! False! They are WAY bigger! False! (sometimes) False!

  3. Do Now False! They make up 10%! 6. Bacteria make up about 1 percent of your dry body weight. 7. Microorganisms produce some of the oxygen we breathe. 8.There are over 350 species of bacteria living inside your mouth. 9. Antibiotics kill viruses. 10.The bubonic plague bacteria was responsible for killing one-third of the population in Europe. True! True! False! They kill bacteria True!

  4. Today’s Objective: • SWBAT explain the three components of the cell theory.

  5. Guided Reading Read the passage, and answer the questions. In a few minutes, you will be able to discuss it with your partner.

  6. Guided Reading 1. What tool was necessary for scientists to learn more about organisms?  2. What was Anton van Leeuwenhoek’s contribution to science?  3. Why did Robert Hooke call his discovery cells?  4. Are you multicellular or unicellular? How do you know?

  7. Guided Reading 5. Who was Robert Hooke, and why was he so important? [Full Sentence(s)] 6. Where do new cells come from? [Full Sentence(s)] 7. In your own words, summarize the cell theory[Full Sentence(s)]

  8. The Cell Theory 1. Cells are the basic unit of structure and function in organisms.

  9. The Cell Theory 2. All living things are made of one or more cells Multicellular (made of many cells) Unicellular (made of one cell)

  10. The Cell Theory 3. All cells come from preexisting cells

  11. >> Check for Understanding Which part of the cell theory do the following describe? 1. Viruses are not considered living things, because they are not made of cells.  2. In order to replace dead skin on the surface, cells below the surface divide.. All living things are made of cells Cells come from pre-existing cells

  12. Independent Practice

  13. Exit Ticket

  14. Biology Project As a class, you will make a timeline showing the discovery of cells and the cell theory. Use the reading provided

  15. Biology Project • Include AT LEAST the following people: • James Watson • Rudolf Virchow • Robert Hooke, • Nehemiah Grew • Marcello Malpighi • Francois Raspail • Barthelemy Dumortier • Franz Bauer • Matthais Schleiden • Henri Milne-Edwards • Theodor Schwann • Robert Remak • Francis Crick • Keith Porter • Anton van Leeuwenhoek

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