BIOLOGY 7 GRADE 7 SCIENCE UNI MUTLI.pptx

SCIENCE 7

1. Cells: The Building Blocks of Life

2. Introduction to Cellular Diversity Today we'll explore the amazing world of cells Discover how organisms can be different based on their cellular structure Learn about unicellular and multicellular organisms

3. What is a Cell? The basic unit of life Contains all the instructions for an organism to function Can be compared to a tiny factory that keeps living things running

4. Unicellular Organisms: Single-Cell Wonders Consist of only ONE cell Complete all life functions within that single cell Examples include: * Bacteria * Amoeba * Some types of algae

5. Characteristics of Unicellular Organisms Extremely small Can survive and reproduce independently Perform all necessary life processes in one cell Typically found in water or moist environments

6. Bacteria: A Unicellular Example Microscopic single-celled organisms Can live in almost any environment Some are helpful, some can cause diseases Reproduce quickly and efficiently

7. Multicellular Organisms: Many Cells Working Together Composed of MANY specialized cells Cells work together to perform different functions Examples include: * Humans * Plants * Animals

8. How Multicellular Organisms Work Cells form tissues Tissues form organs Organs form organ systems Each part has a specific job

9. Human Body: A Multicellular Marvel Contains trillions of cells Different cells have different roles: * Muscle cells for movement * Nerve cells for communication * Blood cells for transportation

10. Think-Pair-Share Activity Individual Reflection: List differences between unicellular and multicellular organisms Pair with a partner and compare lists Share top 3 differences with the class

11. Plant Cells: Another Multicellular Example Have cell walls for structure Contain chloroplasts for photosynthesis Specialized cells for: * Roots * Stems * Leaves

12. Cell Specialization Multicellular organisms have specialized cells Each cell type has a specific function Allows for complex life processes

13. Comparing Unicellular and Multicellular Organisms Unicellular: * Simple structure * One cell does all jobs Multicellular: * Complex structure * Many cells with specific roles

14. Compass Points Activity North: Unicellular organisms are simpler South: Multicellular organisms are more advanced East: Both types are equally important West: It depends on the environment Move to the corner that matches your opinion

15. How Cells Reproduce Unicellular: Often divide into two identical cells Multicellular: Cells specialize and divide for growth Both use cell division to create new organisms

16. Microscopic World Cells are too small to see with naked eye Microscopes help us explore cellular world Reveal incredible details of life's building blocks

17. Importance of Cells Fundamental to all living things Carry genetic information Enable life processes Connect all living organisms

18. Real-World Connections Medical research studies cells Understanding cells helps treat diseases Biotechnology uses cell knowledge Agricultural improvements through cell research

19. Reflection: Learning Check What's the main difference between unicellular and multicellular organisms? Can you name three examples of each? How do cells work together in multicellular organisms?

20. Exit Ticket Write one new thing you learned about cells Share one question you still have Rate your understanding from 1-5

21. Cellular Diversity Celebration Cells are amazing and diverse From single-celled to complex organisms Each plays a crucial role in life Keep exploring the microscopic world!