Cells is the basic unit of life. quarter 2pptx

PowerPoint presentation in Cells

1. THE CELL: THE BASIC UNIT OF LIFE Cells are microscopic units that collectively carry out the processes that make an organism a living entity. Your body is composed of trillions of cells around 200 different types. Your brain is made up of brain cells, your skeleton of bone cells, and your heart is cardiac muscle cells.

2. The Cell Theory 1839, German botanist Matthias Schlieden , German physician Theodor Schwann, and German physician Rudolf Virchow formulated the cell theory. Modern molecular biology has added many principles to cell theory. These are: Energy flows within cells. Cells contain deoxyribonucleic acid (DNA), which passed on from parent cell to the daughter cells during cell divisio

3. 3. All cells have the same composition and metabolic activities 4. Cell activity depends on the activities of subcellular structures within the cell

4. Prokaryotic cells lack nucleus and membrane-bound organelle Ex. Bacterium Bacteria are among the earliest life forms to appear on Earth and are present in most of its habitats

5. Eukaryotic cells have both a nucleus and membrane-bound organelles, more complex rather than prokaryotic cell Eukaryotic cells can be found in unicellular organisms like protozoa and multicellular organisms made up of many cells which include some examples of fungi, protists, plants and animals

6. Unicellular versus Multicellular Organism Unicellular Organisms have “one-cell-one-organism” which means they are made up of only single-cell. They can be prokaryote-like bacteria or eukaryotes like some protists Multicellular Organisms are made up of more than one cell. The cell’s function must be interconnected with the other cell. Ex. Plants, some Fungi and animals

7. Unicellular Prokaryotic

8. Unicellular Eukaryotic

9. Unicellular and Multicellular T-Chart: The students will create a T-Chart about unicellular vs multicellular organisms and prokaryotic vs eukaryotic cells based on: • Number of Cells • Examples • Size • Complexity • How they obtain nutrients • How they reproduce • How they respond to the environment

10. Read

11. Which characteristic is unique to prokaryotic cells? (contains a nucleoid) Eukaryotic and prokaryotic cells share what component? (DNA) Which of the following is not a uniform feature of cellular life? (nucleus) Dogs and mushrooms are examples of what type of organism? (eukaryotic organisms) Overall cell size is restricted by the need to ________. (transport materials inside the cell)

12. 1 . Formative Assessment A. Multiple Choice. Write the letter that corresponds to the correct answer. ________ 1. Which of the following is a characteristic of multicellular organisms? a) Composed of a single cell b) Lack specialized cells c ) Can only reproduce asexually d) Made up of many specialized cells ________ 2. What is a defining feature of unicellular organisms? a) They have complex structures and systems b) They reproduce sexually c) They consist of a single cell d) They are unable to adapt to different environments

13. ___ 3. What enables multicellular organisms to have longer lifespans than most unicellular organisms? a) Ability to hibernate b) Specialized cells c) Ability to reproduce sexually d) Capacity to replace or repair damaged cells ________ 4. Why do multicellular organisms have increased complexity compared to unicellular organisms? a) They have more DNA b) They lack cell specialization c) They have a larger surface area-to-volume ratio d) They consist of many specialized cells working together ________ 5. What is the primary advantage of unicellular organisms? a) Ability to perform specialized functions b) Adaptability to different environments c) Larger size d) Ability to reproduce asexually

14. B. Venn Diagram: Create a Venn Diagram identifying the similarities and differences of unicellular and multicellular organisms.